In a unique species of plants, flowers may be yellow, blue, red, or mauve. All colors may be true-breeding. If plants with blue flowers are crossed to red-flowered plants, all F1 plants have yellow flowers. When these produced an F2 generation, the following ratio was observed: 9/16 yellow, 3/16 blue, 3/16 red, and 1/16 mauve. Determine the F1 results of a cross between true-breeding red and true-breeding mauve flowered plants.
Answer:
F1) 100% bbRr, red flowered plants.
Explanation:
Available data:
flowers may be yellow, blue, red, or mauvecolors may be true-breedingthe cross of blue-flowered plants with red-flowered plants, produce plants that have yellow flowersF2 generation: 9/16 yellow, 3/16 blue, 3/16 red, and 1/16 mauve.Knowing that the phenotypic ratio is 9:3:3:1, we can assume that there are two genes involved in the flower color expression. We can name these genes B and R with a dominant and a recessive allele each (B, b and R, r respectively).
According to the first cross, we might establish the following genotypes:
1st Cross: blue-flowered plant x red-flowered plant
Parentals) BBrr x bbRR
Gametes) Br, Br, Br, Br bR, bR, bR, bR
F1) 100% BbRr, yellow plants
Parentals) BbRr x BbRr
Gametes) BR, Br, bR, br
BR, Br, bR, br
Punnett square) BR Br bR br
BR BBRR BBRr BbRR BbRr
Br BBRr BBrr BbRr Bbrr
bR BbRR BbRr bbRR bbRr
br BbRr Bbrr bbRr bbrr
F2) 9/16 yellow ---> 1/16 BBRR + 2/16 BBRr + 4/16 BbRr + 2/16 BbRR
3/16 blue ------> 1/16 BBrr + 2/16 Bbrr
3/16 red---------> 1/16 bbRR + 2/16 bbRr
1/16 mauve ----> 1/16 bbrr
So,
Yellow-flowered plants: BBRR, BBRr, BbRR, BbRrRed-flowered plants: bbRR, bbRrBlue-flowered plants: BBrr, BbrrMauve-flowered plants: bbrrAccording to these genotypes, the second cross would be like following,
2nd Cross: true-breeding red-flowered plants with true-breeding mauve flowered plants.
Parentals) bbRR x bbrr
Phenotype) Red Mauve
Gametes) bR, bR, bR, bR br, br, br, br
Punnett square) bR bR bR bR
br bbRr bbRr bbRr bbRr
br bbRr bbRr bbRr bbRr
br bbRr bbRr bbRr bbRr
br bbRr bbRr bbRr bbRr
F1) 100% bbRr, red flowered plants.
2. Which is the correct structural organization of a plant?
A. Atom-Cell Tissue- Organ- Organ System Molecule-Cell
B. Cell Tissue- Organ Organ System
C. Atom Molecule Cell Tissue- Organ— Organ System- Organism
D. Atom Molecule- Cell Organ - Tissue Organ System Organism
During mitosis, micro tubes attach to chromosomes at the ____
Do cell membranes contain proteins, but phospholipids and cholesterol
Answer:
In addition to lipids, membranes are loaded with proteins. In fact, proteins account for roughly half the mass of most cellular membranes. Many of these proteins are embedded into the membrane and stick out on both sides; these are called transmembrane proteins.The cell membrane contains a phospholipid bilayer, but the terms are not interchangeable.In addition to the phospholipids, the plasma membranes of animal cells contain glycolipids and cholesterol. ... Because the interior of the phospholipid bilayer is occupied byExplanation:
The principal components of the plasma membrane are lipids (phospholipids and cholesterol), proteins, and carbohydrate groups that are attached to some of the lipids and proteins.how is the hydrosphere connected to the lithosphere
Answer:
Water in the lake (hydrosphere) seeps into the cliff walls behind the dam, becoming groundwater (lithosphere), or evaporating into the air (atmosphere). Humans (biosphere) harness energy from the water (hydrosphere) by having it spin turbines (lithosphere) to produce electricity.
Explanation:
The larvae of frogs are called ___________.
tadpoles
toadstools
pups
hatchlings
Answer:
tadpole
Explanation:
The larva of a frog is referred to as a tadpole, and they look similar to small fish. Tadpoles have small gills and a tail, along with a mouth. Tadpoles don’t tend to move around much at first, staying stationary for the first couple weeks after hatching.
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Which of the following would show the Dominant Genotype? (Choose all that apply)
Answer:
The first one and second one
Explanation:
One trait not typically associated with a bureaucracy is _____.
flexibility
multiple forms
red tape
multi-tiered decision-making
Answer:
flexibility
Explanation:
I hope this helps!
What does the ratio 3:1 mean?
Pls answer
Answer:
ratio of 3:1 means that there are 4 parts altogether. The fractions from the ratio can therefore be deduced as. 34and14. These represent the percentages: 75%:25%
What is NOT a function of the nucleus?
Answer:
The nuclues cannot help modify proteins.
Explanation:
Not all organism that are born can be supported by the environment because organisms (blank) for resources
Answer:
This blank space in this question is COMPETE
Explanation:
This question is describing natural selection, which is the theory proposed by Charles Darwin where he stated that organisms that are better suited for an environment will survive and reproduce better than others.
In the environment, resources such as food, water, mate etc are limited, hence, organisms must COMPETE for the available ones. In this case, organisms that are better adapted will triumph over others. Therefore, it is certain that not all organism that are born can be supported by the environment because organisms COMPETE for resources.
list 5 disorders that affect female reproductive system an discuss them
Answer:
Endometriosis.
Uterine Fibroids.
Gynecologic Cancer.
HIV/AIDS.
Interstitial Cystitis.
Polycystic Ovary Syndrome (PCOS)
Which organisms perform photosynthesis in the ocean?
Answer:
Bioplaykton
Explanation:
Which best describes how to classify water?
Describe what animals do during
competition.
While dry cleaners are small businesses, they generate relatively large volumes of hazardous substances. EPA estimates the average dry cleaner generates 660 gallons of hazardous wastes a year. Unlike petroleum contamination which may break down over time by naturally-occurring bacteria in the environment, the chlorinated solvents that are used by dry cleaners are resistant to biodegradation. As a result, groundwater contamination from dry cleaners has a greater potential to migrate off-site which can be problematic since dry cleaners are often located within proximity to residential neighborhoods. Indeed, a 2002 Florida study found that dry cleaner contamination had migrated off-site at 57 percent of the contaminated sites. Due to these types of environmental hazards when commercial land is sold require a Phase 1 Environmental Assessment according to the Comprehensive Environmental Response, Compensation and Liability Act. Why would the type of monitoring required as part Phase 1 Environmental Assessments be important if a dry cleaner was being sold?
A) The monitoring will indicate any environmental damage done that should be remediated prior to selling the land.
B) This type of monitoring will allow the government to only sell land to businesses that have environmentally friendly practices.
C) The monitoring prevents the land from being resold to any dry cleaning businesses which can be damaging to the environment.
D) The monitoring will allow the government to determine which type of business is better for the environment so dangerous businesses can be closed.
Answer:B) This type of monitoring will allow the government to only sell land to businesses that have environmentally friendly practices.
Explanation: because will allow the government to only sell land to businesses that have environmentally friendly practices.
If a molecule is too large to pass through a cell membrane, it will need to use a
Which body sense (choose only 1) do you think is most important? Explain why and provide at least 2 examples. (Your essay must be 1-2 paragraphs).
Answer:
I believe sight is the most important body sense. Our eyes are able to protect us from danger and allows us to complete many day to day functions. Without our sight, we could be much more easily placed into harms way. Our eyes take over to ensure we are prepared for anything we may encounter.
Explanation:
24. Natural selection (1 point)
A is directionless
B is random
C guides evolution
D does not exist
Answer:
c
Explanation:
Discuss the similiarities between
Bryophytes and
Pteridophyte
Answer:
Similarities between Bryophytes and Pteridophytes
Ø Both Bryophytes and Pteridophytes are land plants. Ø Both possess distinct Gametophytic and Sporophytic generations. Ø Both groups show heteromorphic alternation of generation. Ø Rhizoids are present in Bryophytes and Pteridophytes
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What is pseudoscience? Students have been comparing pseudoscience with "real" science. Their teacher told them to make a chart comparing the two. As they brainstormed, they came up with the list you see here. Which statements should be placed under the heading "pseudoscience"? Choose all that apply.
A) You are to believe in spite of the facts, not because of them.
B) Failure to provide evidence is ignored, excused, or explained away.
C) A scientist has no personal financial stake in any outcome of experimentation.
D) Experiments must be precisely described so that they can be duplicated exactly, verified, or improved upon.
E) The literature is aimed at the general public. There is no review, no standards.
Answer:
b and e
Explanation:
i got it correct in usatestprep :)
Clear-winged dragonflies live longer and can reproduce
many more times than yellow-winged dragonflies.
How is this population of dragonflies most likely to change as a result of this
difference?
Answer:
Yellow-winged dragonflies will most likely decrease and eventually die out on account of being easily spotted by predators.
Answer: Clear-winged dragonflies will become more common over time.
Two substances, both solids, start at the same temperature. You transfer the same amount of energy
into both solids, but substance 1 becomes a liquid before substance 2. Based on this evidence, which
substance has a stronger molecular attraction?
Substance 1
Substance 2
PLS HELP
what is the purpose of the article The Amazing World Inside a Human Cell
How would Darwin explain the change the length of the giraffes neck ?
Answer:
There were mutations that led to some longer necks and some shorter necks, as the trees became taller, the short necks died out due to starvation, leaving behind only the longer necked giraffes. Survival of the fittest.
if the skeletal muscle cells in your leg are performing lactic acid fermentation to produce the necessary ATP for their proper functioning, decribe what is happening to the O2 gas you are breathing
Answer:
The O2 gas in uses in Aerobic Respiration and That O2 is performing that process to make ATP for your body and making glucose to function your body
Explanation:
Lactic Acid Fermentation is Anaerobic Respiration which doesn't Involve Oxygen
Sorry if I'm wrong
Hope this helps!
. Two students are discussing natural selection in bacteria and how it can relate to antibiotic resistance in
bacteria.
Bernadette states that when antibiotics are used, bacteria can respond by developing traits to help them
defeat the antibiotic, which then may increase their fitness.
Dominique states that there is already a variety of traits among the bacteria. Bacteria that have traits that
allow them to survive the antibiotic and reproduce may have higher fitness.
Which individual's reasoning do you agree with more and why
Answer:
Bzryh
Explanation:
because he won
Which scientific area has the most influence in shaping modern classification methods?
Answer: The answer is " evolution". Evolution is a major force in shaping modern classification methods. Evolution is the adjustment in the qualities of an animal categories more than a few ages and depends on the procedure of common determination.
The scientific field which has had the greatest influence on shaping modern classification methods is Evolution.
What is Evolution?Evolution is concerned with the sequence of changes which occur in organisms as they transform from their ancient forms to their modern forms.
It is the change in the genetic characteristics of a biological population over successive generations. These characteristics are manifestations of genes passed from parents to offspring during reproduction.
The three main types of Evolution are:
1. Divergent Evolution
2. Convergent Evolution
3. Parallel Evolution
Thus, the scientific field which has had the greatest influence on shaping modern classification methods is Evolution.
Learn more about Evolution, here:
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What evidence indicates that the Earth is 4.6 billion years old?
using carbon 14 dating methods on earliest life forms
using the radiometric dating of early Earth rocks
calculating the cooling rate of the Earth's mantle
adding up the layers of rock strata
Answer:
Is THe Second One -using the radiometric dating of early Earth rocks
Explanation:
I took the quiz(plase mark me brainlist)
Which sentence should be added to the introductory paragraph at the point
indicated to best provide background information about the topic?
What happens when a dentist and a candymaker meet? Together,
William Morrison, a dentist, and John C. Wharton, a handymaker,
invented the modern version of cotton candy, a treat popular with both
the young and old. The two sold their cotton candy at the Paris
Exposition in 1900 and the St. Louis World's Fair in 1904 for 25¢ a box,
and the rest is history. The fascinating story of how cotton candy
found its place in American culture is as sweet as the treat itself.