phenotypes and genotype help

Biology
Tutor: None Selected Time limit: 1 Day

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

Thank you for the opportunity to help you with your question!

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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Jul 13th, 2015
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