13. Mendelian Genetics

Which of the following is the genotypic ratio of offspring created from a cross of two heterozygous parents for a single gene?

a) 2:2

b) 3:1 

c) 1:2:1 

d) 1:3

In a single gene cross between a homozygous dominant parent and a homozygous recessive parent, which generation is always completely heterozygous?

a) F1 generation.

b) F2 generation.

c) F3 generation.

d) P generation.

Which of the following single gene crosses would always result in all offspring with the dominant phenotype?

a) tt x tt. 

b) Tt x Tt. 

c) TT x tt. 

d) Tt x tt.