Question

Question 1 (10 points) Saved In a simple dominant-recessive inheritance pattern, what percentage of the offspring would be carriers if one parent is homozygous dominant and one parent is heterozygous for the gene? 100% 75% 50% 25% 0% O

Answer 1

Let A be the dominant allele and a be the recessive allele,

Parent - Phenotype Homozygous dominant x Heterozygous

Genotype AA Aa

Gametes A A , a

Progenies

	A	a
A	AA	Aa
		carrier

only the heterozygous conditioned ones can become carriers.. hence 50% of progenies will be carriers. Homozygous can only become affected with the disease. in case colour blindness the progenies with only CsCs will only becom affected. CsC only become carriers.