what is directional selection

Answers

Answer 1

Answer:

Directional selection occurs when individuals with traits on one side of the mean in their population survive better or reproduce more than those on the other

Explanation:

hope it helps

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Related Questions

If the gene for not having Albinism (A) is dominant over the gene for having albinism (a). How can two non-albino people have an albino child. which genotype makes this possible?

Answers

The genotype Aa makes this possible. I think

The gene for fur color in mice has two alleles, the allele for gray fur
(G) is dominant to the allele for black fur (g). What would be the
phenotype of a mouse with genotype gg?

A Gray fur
B black fur
C Gray fur with the black spot
D Black fur with the gray spot

Answers

B. Black fur
Hope this helps!

How is it possible to find the
number of heterozygotes in a
sample population, given the
allele frequencies?

Answers

Explanation:

The frequency of heterozygous individuals. Answer: The frequency of heterozygous individuals is equal to 2pq. In this case, 2pq equals 0.32, which means that the frequency of individuals heterozygous for this gene is equal to 32% (i.e. 2 (0.8)(0.2) = 0.32

To find the number of heterozygotes in a sample population, we need to know the allele frequencies and the total number of individuals in the population. The formula used to calculate the expected number of heterozygotes in a population is based on the Hardy-Weinberg equilibrium principle.

The Hardy-Weinberg equation is given as:

p² + 2pq + q² = 1

Where:

p = frequency of one (dominant) allele

q = frequency of the other allele (recessive) allele

p² = expected frequency of homozygous dominant individuals

2pq = expected frequency of heterozygous individuals

q² = expected frequency of homozygous recessive individuals

To find the number of heterozygotes, we can multiply the expected frequency of heterozygotes (2pq) by the total population size. This will give us an estimate of the number of individuals in the population who are heterozygous for the specific gene of interest.

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And what parts of a river with sediments be able to settle

Answers

Provide the full question to be able to answer your question.

A homo-zygous round seeded plant is crossed with a homo-zygous wrinkled seeded plant. Round R is dominant to wrinkled r.What alleles would be in the gametes of the round seeded plant?
A. R,r
B. RR
C. Rr
D. R,R

Answers

I think the correct answer is D. But don’t put answer

How would an error during mitosis cause a different effect on the body than an
error during meiosis

Answers

Mistakes during mitosis lead to the production of daughter cells with too many or too few chromosomes, a feature known as aneuploidy. Nearly all aneuploidies that arise due to mistakes in meiosis or during early embryonic development are lethal, with the notable exception of trisomy 21 in humans.

A mistake in the process of mitosis leads to the development of the daughter cells having chromosomes without segregation.

What is mitosis?

A cell undergoes cell division by replicating its chromosomes, segregating chromosomes, and creating two identical nuclei during the mitotic phase. The cell organelles are divided equally between two daughter cells with the same set of genomes after mitosis.

Prophase, prometaphase, metaphase, anaphase, and telophase are the main four stages. Meiosis creates cells that are genetically distinct from the parent and have half as much DNA as mitosis, which divides a single "parent" cell into two genetically identical cells.

Therefore, mitosis is a process used in the somatic cells whereas miosis is in fertilization.

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I’ll give BRAINLIST??What organs/organs systems does schizophrenia affect and how does it affect it?

Answers

Answer:

centeral nearvous system

Explanation:

Answer:

Schizophrenia is associated with changes in the structure and functioning of a number of key brain systems, including prefrontal and medial temporal lobe regions involved in working memory and declarative memory, respectively.

Explanation:

Have a great day!

Q2. How are rainbows formed in nature?
help po need na po mamaya

Answers

Answer:

A rainbow is caused by sunlight and atmospheric conditions.

Explanation:

I hope it helps you!

List the angles in order from smallest to largest. Note image in not drawn to scale

Answers

Answer:

maybe cab If it's wrong I'm so sorry

The biome immediately south of the Taiga is the ______.
(A) Temperate deciduous forest,
(B) Savanna
(C) Tundra
(D) Chaparral.

Answers

Answer:

tundra

Explanation:

The β chains of HbA and HbS were treated with trypsin, and the sequence of the N-terminal tryptic peptides are as given below. Do these peptides separate from each other in an electric field if the pH is 7.0? Explain in detail the reasoning behind your answer and include your calculations for the charge of each peptide in your answer.

HbA: Val-His-Leu-Thr-Pro-Glu-Glu-Lys

HbS: Val-His-Leu-Thr-Pro-Val-Glu-Lys

Answers

Yes The two peptides will separate from each other in an electric field when the pH is 7.0

The two peptides wil drift/separate from each other when the pH is 7.0 because of the reaction of trypsin enzyme and also the difference in charge between HbA and Hbs

Considering charge of each peptide

Since The isoelectric point of normal Hba is 6.9 and Hbs possess two fewer negative charges per hemoglobin molecules

The Hbs is more hydrophobicity than HbA due to the substitution of glutamic acids of HbS by valine residue.

Considering Electrophoresis

At a lower pH level Hbs shows a slower moving band than Hba

while a higher pH level the HbS peptide is less negatively charged while the carboxyl group of HbA is more negatively charged and Hba moves faster as well as an acidic pH.

Hence we can conclude that the two peptides will separate from each other in an electric field when the pH is 7.0

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which is not a topic of biology?
a. the distribution of sand on an ocean floor
b. the chemicals at work in the stomach
c. the speed at which a hummingbird flies

Answers

a. the distribution of sand on an ocean floor
C. The speed at which a hummingbird flies

In cocker spaniels, solid color (S) is dominant over spotted (s). If a solid male is crossed with a spotted female and they produce all solid colored puppies, the genotypes of the parents must be:

Answers

Answer: the genotypes must be solid that is. if the male is a solid colored genotype

vermiform appendix is a vestigial organ in human being give reason.​

Answers

Answer:

The human appendix may be considered as a vestigial organ as it has been proved that the removal of the organ after infancy does not create any harm. Vestigial in that sense means that the vermiform appendix seemingly has no functions or is useless now but they might have had functions previously which are lost someway due to evolution.

Explanation:

Vestigial organs are organs, tissues or cells in a body which are not functional anymore the way they were in their ancestral form of the trait. It is therefore authentication of evolution and hence were helpful in explaining adaptation.

Which of the following is a form of the
inclined plane?
A) pulley C) wheel and axle
B) screw D) lever

Answers

I believe the answer is A hoped this helped

The answer is a or d.because it is

What type of mutation changes a single DNA nucleotide base, and causes a change in a specific codon?

Answers

Answer:

A base substitution mutation is the answer.

Explanation:

A base substitution mutation changes only a single nucleotide within a gene sequence, so only one codon is affected.

Calcite is created by combining:
a. calcium, carbon, and nitrogen
b. calcium, carbon, and oxygen
C. calcium, oxygen, and nitrogen
d. calcium, oxygen, and hydrogen
Please select the best answer from the choices provided
Ο Α
O B
O C
O D

Answers

Answer:

Calcite is created by B: Calcium, Carbon, and Oxygen

pls help click the link answer​

Answers

Answer:

1. Transfer

2. Share

3. Subscript

4. Positive

Need ASAP! Will mark best answer brainliest!
List two things that can increase genetic variation in meiosis and explain how they can impact the next generation of living things.

Answers

Environment, genetics, selective breeding, random mating, random fertilization, recombination, crossing over, etc

Which statement is true about the particles in liquid water at 100°C and the particles in steam at 1000C? (Select ALL that apply)

the particles will have the same kinetic energy

the space between the particles is different with more space between particles in a gas

the particles will have different kinetic energy

the space between the particles is different,with less space between particles in a gas​

Answers

The particulate nature of matter explains that when a substance gets heated it particles gets energised and they move away from one another in a random manner, hence the correct options are

The space between the particles is different with more space between particles in a gasThe particles will have different kinetic energy

What happens to particles when they are heated

With an increase in temperature, the particles move faster as they gain kinetic energy, resulting in increased collision rates and an increased rate of diffusion.

With an increase in temperature, the particles gain kinetic energy and vibrate faster and more strongly

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Is fermentation as efficient as aerobic cellular respiration? Multiple choice question, yes or no?

Answers

Answer:

NO

EXPLANATION :

Aerobic cell respiration is roughly 18 times more efficient than anaerobic cell respiration. Your cells require a lot of energy and are dependent on the high efficiency of aerobic respiration. They quickly die if deprived of oxygen.

Which of the following initiatives help harvest renewable energy in some TCS offices

Answers

The initiative (technology) which help harvest renewable energy in some TCS offices is: Solar water heaters.

TCS is an acronym for Tata Consultancy Services and it is a multinational IT services, consulting and business solutions company that was established on the 1st of April, 1968 in Mumbai, India. Also, TCS has a large network of initiative (technology), innovation and delivery centers across the world.

In 2013, TCS was deeply invested in harnessing renewable energy to generate electrical energy and reducing the emission of carbon, especially by developing solar energy. Thus, solar product solutions such as solar water heaters and lighting systems were installed in some of its offices because they were economically viable and would help meet their energy needs.

In conclusion, solar water heaters was the initiative (technology) that helped harvest renewable energy in some TCS offices.

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[ANSWER INCLUDING]
The pedigree on the right shows the inheritance pattern for an X-linked recessive disorder.
The mother of the individuals circled in pink is not shown on the pedigree. Based on the phenotypes of these individuals and their father, what are the possible genotypes of their mother? Check all of the boxes that apply.
- XAXA
- XaXa
- XAXa

Answers

The mother's genotype can be either [tex]X^AX^A[/tex] or [tex]X^AX^a[/tex].

For X-linked recessive traits, males (XY) can either be affected or free from the disorder, they cannot be carriers. Females (XX), on the other hand, can be affected, unaffected, or be carriers.

The circled male child is free from the disorder ([tex]X^AY[/tex]) while the females are carriers ([tex]X^AX^a[/tex]).

The male inherited the healthy allele, [tex]X^A[/tex], from the mother.

The female children inherit the affected allele from their father (who is affected for the disorder) and the other healthy allele from their mother.

This means that the mother cannot be affected for the disease. As it is, the pedigree points that all the children got their healthy alleles from their mother. This does not mean the mother has two healthy alleles though.

Thus, the possible genotype of the mother are [tex]X^AX^A[/tex] and [tex]X^AX^a[/tex].

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Taste action potentials move through cranial nerve number ____ to the brain.

Answers

Answer:

Cranial Nerve #9

Explanation:

Cranial nerve number 9 is also called the glossopharyngeal nerve. Taste perception is really cool I recomend studying this topic well!

Which best describes a temperate deciduous forest?

(A) Seasons are well defined,

(B) Short growing season,

(C) Low rainfall,

(D) all of the above.

Answers

Answer:

I think its D all of the above

Which two soil conservation techniques would be best to use on gentle slopes?​

Answers

Answer:

planting trees

contuor farming/building of porous dams

more complex
mito-
Chondria
___
Contains
DNA
mitochondria
produce
ATP
Which is used by
___ To make___
Which pass the to interior of the
golgi
Then are modified by the
golgi
Then are distributed to
Parts of the cell

Answers

Answer:

Both plant and animal cells have mitochondria because they both. need ATP for energy. ... Proteins are processed and modified in the interior of the.

Explanation:

Answer:

Both plant and animal cells have mitochondria because they both. need ATP for energy. ... Proteins are processed and modified in the interior of the.

Explanation:

Anaerobic respiration occurs when

a. There is too much oxygen to do aerobic respiration
b. Photosynthesis cannot take place
c. There is not enough oxygen to do aerobic respiration
d. It is usually occurring in your body

Answers

I think the answer is A.

HELP PLEASE ITS AN EXAM!!
Which organisms are most closely related?
O species A and B
O species A and C
O species B and C
O species C and D

Answers

Answer:

B and c are most closely related

Explanation:

Who did the ram caught in the thicket (Genesis 22:13) represent?

Answers

Answer:

Woolley dubbed the statues “Rams Caught in a Thicket” as an allusion to the biblical story of Abraham. They more likely represent goats, which could often be seen standing on their hind legs, to reach leaves in the trees, as seen here.

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