Which cross will yield four phenotypes in the 1:1:1:1 ratio

Answers

Answer 1

Answer: The answer is RrYy x rryy.

It is known that the in dihybrid cross (a cross between two different traits), the phenotypic ratio between the offspring in the F2 generation is 9:3:3:1. To get phenotypes in ratio 1:1:1:1, there must be a cross between heterozygote for both traits and recessive homozygote for both traits. This can be concluded if these two traits are analyzed separately:
Parents: Rr x rr
Offspring: Rr Rr rr rr
So, the ratio is 2:2 or 1:1.
The same ratio is for cros Yy x yy.
Thus, the cross between RrYy and rryy will yield four phenotypes in the 1:1:1:1 ratio.
In the attached photo, 1/4 of the offspring are RrYy, 1/4 are Rryy, 1/4 are rrYy, and 1/4 rryy. The ratio is 1/4:1/4:1/4:1/4, which is the same as 1:1:1:1.

Answer 2

Answer:

Answer:

RrYy x rryy was verified correct on test

Explanation: jcAlmighty is correct and provided helpful data. just took odyssey ware bio test. Question: Which cross will yield four phenotypes in the 1:1:1:1 ratio? A. rryy x rryy, B. RrYy x rryy, C. RrYy x RrYy, D. RRYY x rryy. B. RrYy x rryy was correct

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Which is one source of the sediments that form sedimentary rocks?chunks of coal
particles in new rocks
liquid magma
materials dissolved in solutions

Answers

Most sedimentary rocks are formed in a process that involves water. It is one of the primary factors in the mineral formation of chemical sedimentary rock. Thus, option D is correct.

What role of dissolved materials in the sedimentary rocks?

Mineral crusts are formed on the sedimentary grains as a result of dissolved minerals in groundwater precipitating (crystallizing) from water in the pore spaces and eventually cementing the sediments to create a rock.

Chemical sedimentary rocks are created when minerals precipitate from water. When dissolved substances leave water, it precipitates. Take a glass of water and add some salt (halite), for instance.

Additionally, it acts as an erosive and weathering agent, generating the grains that eventually form detrital sedimentary rock.

Therefore, materials dissolved in solutions is one source of the sediments that form sedimentary rocks.

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Answer:

D - materials dissolved in solutions

Explanation:

EDGE 2021

Many scientists suggest that billions of years ago,life on Earth began with
(1) simple, single-celled organisms
(2) simple, multicellular organisms
(3) complex, single-celled organisms
(4) complex, multicellular organisms

Answers

Many scientists believe that life on Earth started with simple, single-celled organisms. Therefore, the correct statement is option A.

What are single-celled organisms?

Single-celled organisms are unicellular organisms that contain only one cell and form the most ancient part of life. They can be prokaryotic or eukaryotic organisms.

Life on earth began with simple, single-celled organisms which are usually prokaryotes, such as bacteria and constitutes the most abundant type of organisms on earth. Prokaryotes lack a nucleus and membrane-bound organelles.

By this time, these single-celled organisms evolved to form more complex organisms. Multicellular organisms first evolved around 1 billion years ago, but they are still considered simple to the organisms present today.

Therefore, simple, single-celled organisms are the first to live on earth billions of years ago.

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i think your anwser would be all of the above but you don't have it

How does biogeography contribute to an understanding of evolution?

Answers

In biogeography studies, similar animals that seem
to be closely related are adapted to different environments
in nearby areas. Also, in areas that are
widely separated animals that seem to be unrelated
are observed to have similar adaptations to
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In biogeography studies, similar animals that seem to be closely related are adapted to different environments in different areas. Also, in area that are widely separated animals that seem to be unrelated are observed to have similar adaptions to similar environments in separate areas.

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Answers

For a given species an increased evolutionary rate would cause a decrease in mutation rate.
>Three factors that would increase the rate of evolution would be the intensity of directional selection, an increase in the birth rate, hence an increase in the number of possible beneficial mutations, and an increase in the population size.>There are many limiting factors that might control the evolutionary rate of change. Physical or biological changes influencing the environment can play a major role in the rate of evolutionary change.

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Answers

Answer:

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Answers

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