phenotypes and genotype help

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When allele A is dominant over allele A', write out the parental phenotypes and genotypes. Then write out the offspring phenotypes and genotypes as well as the number of each.

Jul 13th, 2015

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Genotypes:

AA = Homozygous dominant

AA` = Heterozygous

A`A` = Homozygous recessive

Phenotypes:

AA & AA` = Display dominant A

A`A` = display recessive A`

For offspring, as follows:

AA x AA = Both parents hom. dominant. All offspring homozygous dominant.

A`A` x A`A` = Both parents hom. recessive. All offspring hom. recessive.

AA x AA` = 2/4 offspring hom. dominant; 2/4 offspring het. dominant

AA x A`A` = All offspring het. dominant

AA` x AA` = 1/4 offspring hom. dominant; 2/4 offspring het. dominant; 1/4 offspring hom. recessive

AA` x A`A` = 2/4 offspring het. dominant, 2/4 offspring hom. recessive.

Please let me know if you need any clarification. I'm always happy to answer your questions.
Jul 13th, 2015

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