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4 years ago

HELP I NEED THIS FOR TOMORROW!! 15 POINTS!!! I WILL MARK YOU AS THE BRAINLIEST ANSWER IF YOU EXPLAINED IT WELL

Biology

2 answers:

Aleks04 [339]4 years ago

8 0

The dominant trait is the trait that occurs more frequently. An example is 60% of students have dimples which would be dominant over those who do not have dimples which is 40%

ra1l [238]4 years ago

5 0

When people hear the word “dominant”, often they incorrectly believe that the majority of the population expresses this trait. Describing a trait as dominant does not mean it is the most common; it means that it is expressed over the recessive trait.

PTC is the answer

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In some breeds of mice, yellow coat color is

Elis [28]

In the exposed lethal genes cause the individual's death during embryionic development before being born. H0m0zyg0us dominant individuals do <u>not get born</u>. Yellow: 2/3. Grey: 1/3. Phenotypic ratio: 2:1

<h3>What is complete dominance?</h3>

When the dominant allele completely masks the expression recessive allele, we talk about complete dominance.

This is the case of individuals that are heter0zyg0us for a particular gene and express the dominant trait.

The dominant allele is hiding the expression of the recessive allele.

<h3>What are the lethal genes?</h3>

Refer to genes that impede the normal development of the individual.

They can cause death during embryo development <u>before the individual gets born, </u>

They can cause the individual's death after being born and <u>before reaching </u><u>sèxual maturity</u><u>. </u>

Let us assume that mice color is coded by a single diallelic gene that expresses complete dominance.

<u>Available data</u>:

Yellow color is dominant over grey color.

Yellow is coded by the dominant allele Y
Grey is coded by the recessive allele y

Genotype YY → Yellow and lethal

Genotype Yy → Yellow

Genotype yy → Grey

The cross would be as follows,

Cross: Yy x Yy

Gametes) Y y Y y

Punnett square) Y y

Y YY Yy

y Yy yy

F1) Considering ONLY the successfully born individuals

<u></u>

<u>Genotype</u>

2/3 = 50% of the progeny is expected to be heter0zyg0us, Yy.

1/3 = 25% of the progeny is expected to be h0m0zyg0us recessive, yy.

<u></u>

<u>Phenotype </u>

2/3 = 50% of the progeny is expected to be yellow, Yy.

1/3 = 25% of the progeny is expected to be grey, yy.

The phenotypic ratio is 2:1

You will learn more about lethal genes at

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2 years ago

During which phase of the cell cycle is the cytoplasm and its contents divided to form two new daughter cells?

hichkok12 [17]

The correct response would be A. Cytokinesis.

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4 years ago

Read 2 more answers

Which event took place during the Copernican revolution, when most people started to believe in a heliocentric model of the sola

Arturiano [62]

Copernicus rediscovered Aristarchus's heliocentric model. Thus, option "B" is correct.

<h3>How, explain your answer?</h3>

The event which took place during the Copernican revolution, when most people started to believe in the heliocentric model of the solar system was that Copernicus rediscovered Aristarchus’s heliocentric model.

Thus, option "B" is correct.

To learn more about Copernicus rediscovered click here:

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2 years ago

Compare and contrast the structure of a DNA nucleotide and an RNA nucleotide.

notka56 [123]

The similarity between the the DNA and RNA molecules is that both of them are long polymers and they are made up of nucleotides.
The differences between the two molecules are as follows:
1. The sugar components of the DNA molecule are deoxyriboses while the sugar components of the RNA molecules are riboses.
2. The nitrogenous bases in DNA molecule are adenine, guanine, thymine and cytosine while the nitrogenous bases in the DNA molecule are adenine, guanine, uracil and cytosine.
3. The back bone of the DNA molecule is made of the deoxyriboses and phosphate while the back bone of the RNA molecule is made up of riboses and phosphate.

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4 years ago

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Usimov [2.4K]

Answer:

Lipids are the base molecules our bodies use to make hormones

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3 years ago