BN06 · Quiz — Genetics & Evolution

Question 1

Incomplete dominance differs from codominance in that:

AIn incomplete dominance, both alleles are expressed equally; in codominance the phenotype is intermediate

BIn incomplete dominance, the F1 heterozygote shows an intermediate phenotype (blending); in codominance, BOTH parental phenotypes are expressed simultaneously in F1

CIncomplete dominance violates Mendel's laws; codominance does not

DIn codominance, one allele is silenced; in incomplete dominance, both are expressed at 50% strength

Question 2

In the ABO blood group system, which cross between parents would produce offspring of all four blood groups (A, B, AB, and O)?

AType A × Type B (if both parents are heterozygous: I^A i × I^B i)

BType AB × Type O

CType A × Type A

DType B × Type B (both homozygous)

Question 3

The Hardy-Weinberg equilibrium states that allele frequencies in a population remain constant if:

ANatural selection strongly favours the dominant allele

BThe population is large, random mating occurs, no mutation, no migration, and no selection

CThe population undergoes bottleneck events periodically

DGenetic drift reduces allele diversity to a minimum

BN06 — Genetics & Evolution — Quiz