Question

Anya and Greg are working in their research laboratory. Anya tells Greg that one of the mice has a 50% probability of having the alleles DD and a 50% probability of having the alleles Dd. How can Anya explain her reasoning? In two out of 50 times, the mouse has the alleles DD or Dd. The probability that the mouse has the alleles DD is equal to the probability that it has the alleles Dd. The mouse is twice as likely to have the alleles DD than it is to have the alleles Dd. There are two more possible outcomes besides the mouse having DD or Dd alleles.

Answer 1

Step-by-step explanation:

A Dominant Allele is an Allele that express itself.

DD- this represent a dominant homozygous allele

Dd- represent a dominant heterozygous allele

When an individual with DD is crossed with Dd we will have DD,Dd,DD,Dd

Phenotypic ratio is 2:2

i.e homozgous dominant crosses with heterozygous dominant

which means both DD and Dd have 50% chance of occuring in the genotype and the probabality is the same.

Note that in the phenotype of an individual with homozygous dominant (DD) is the same phenotype with heterozygous dominant(Dd)

Answer 2

Option B: The probability that the mouse has the alleles DD is equal to the probability that it has the alleles Dd.

Step-by-step explanation:

Anya tells Greg that one of the mice has a 50% probability of having the alleles DD and a 50% probability of having the alleles Dd.

She can explain her reasoning by saying that both pairs of alleles (DD and Dd) has equal chance of being expressed i e, the probability that the mouse has the alleles DD is equal to the probability that it has the alleles Dd. Both pairs each has 0.5 chance of occuring.