Question

2. In humans, pigmented skin (H) is dominant over albino skin (h). An albino woman marries a pure-line man with pigmented skin and they have twelve children.

a) Write the genotypes of the parents: Man_________ Woman_______

b) Write the genotypes of the children: ________  

c) If these children marry genotypes like themselves and from these unions 80 grandchildren are produced. 1) What are the possible gametes produced by the F1 generation parents (from b above): Remember to circle them.    

2) Of the 80 F2 Grandchildren, give the genotypes and phenotypes and the expected proportions by giving both the letter symbol and the skin character. proportion genotype phenotype          

3) Of the 80 F2 grandkids, give the number of each genotype you would expect to see. # genotype

Answer 1

The monohybrid cross of F1 individuals will produce 1(HH) : 2(Hh) : 1(hh) genotypic ratio and 3(pigmemted) : 1(albino) phenotypic ratio.

Thanks