You are examining offspring (zygotes) of females that may have one or more copies of a recessive mutation in a maternally active segmentation gene. Which of the following zygotes will have a mutant phenotype: (1) A homozygous zygote that came from a heterozygous mother. (2) A heterozygous zygote that came from a heterozygous mother. (3) A heterozygous zygote that came from a homozygous mother. A. Choices 1 and 2. B.. Choices 2 and 3. C. All of these choices. D. Only choice 3.

Answer is only 1st case that is homozygous zygote is the right answer.

Explanation:

In maternal recessive mutation both the alleles are mutant and exhibit mutant phenotype. The mutated alleles are present as homozygous.

From the definition it is concluded that:

first case, homozygous zygote is mutant phenotype

second case, heterozygous zygote not mutant phenotype

in third case, heterozygous zygote not mutant phenotype.

currents is the correct answer.

you can have just about every answer you can think of