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dusya [7]
3 years ago
8

In flies, red eyes (R) are dominant to brown eyes (r). A heterozygous fly is crossed with a homozygous recessive fly

Biology
1 answer:
hichkok12 [17]3 years ago
7 0

Answer:

The cross of a heterozygous fly with a homozygous fly can be shown as follows:

         r            r

R      Rr           Rr

r        rr            rr

The results show that there is a 50% probability that the flies produced will have red eyes. Their genotypes will be heterozygous.

The results of the punnet square show that there will be a 50% probability that the offsprings will have brown eyes. Their genotype will be homozygous recessive.

A homozygous trait can be described as a trait which has same alleles for the gene which encodes the trait. Heterozygous means that both the alleles for the trait will be different.

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7. In the pocket mice investigation, what patterns in the data did you observe? Does the pattern in the
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Dark fur color appears to be an adaptation for mice living in dark environments, as both the frequency of the characteristic and the allele that generates it have altered. These findings further back with the theory that selection is context-dependent, as dark mice were preferred in some contexts but not in others.

<h3>What is mutation?</h3>

A mutation is defined as a change in the sequence of genetic letters, called bases, within a molecule of DNA.

In a population, more offspring are born than can survive, resulting in competition among people. Individuals that possess a certain trait are more likely to live and/or produce more offspring than those who do not possess that trait. The context in which a species exists influences its selection. Characteristics that are advantageous in one setting may be detrimental in another.

New mutations cause black color.

  1. Fur color is controlled by many genes (4:29).
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  3. pocket mice differ in one gene (Mc1r; 4:55).

For more information regarding mutations, visit:

brainly.com/question/17031191

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8 0
1 year ago
When does DNA synthesis occur?
SashulF [63]

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In the S Phase

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This is because chromosome duplication occurs in this which is similar or the same to DNA synthesis

8 0
3 years ago
A population of crabs living on a sandy beach exhibits three colors: dark brown, light
PolarNik [594]

Answer:

100% of the progeny will be speckled

Explanation:

<u>Available data:</u>

  • Three colors: dark brown, light  brown, and speckled.
  • The genotypes for these colors are BB for dark brown, bb for light brown, and Bb for speckled.

Cross: dark brown crab  with a light brown crab

Parentals) BB     x     bb

Gametes) B   B        b    b

Punnett square)

                     B        B

            b      Bb      Bb

             b     Bb      Bb

F1) Genotype:

     4/4 = 100% of the progeny will be heterozygous for the trait, Bb

     Phenotype:

    4/4 = 100% of the progeny will be speckled

5 0
3 years ago
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