Genetics Review

having two identical DOMINANT alleles (letters) for a gene

• homozygous dominant

• homozygous recessive

• genotype

• phenotype

Letter combination that represents a gene (ex. BB or Bb)

• phenotype

• genotype

• heterozygous

• homozygous recessive

having two different alleles (letters in a genotype); one dominant, one recessive

Ex. Bb or Rr

• phenotype

• genotype

• homozygous dominant

• heterozygous

physical characteristics of traits, it is what you see

• genotype

• phenotype

• heterzygous

• allele

having two identical recessive alleles for a gene

• homozygous dominant

• heterozygous

• dominant recessive

• homozygous recessive

The Punnett square is a mathematical model that predicts the probability of the genotype (genetic makeup) and phenotype of the offspring of a cross between parents.

• true

• false

Which of the following is homozygous?

• Dd

• aa

• Bb

• Ww

Which of the following represent phenotypes?

• Bb

• BB

• green eyes

• WW

Which of the following are heterozygous? Select all that apply.

• Bb

• WW

• brown hair

• LL

Which of the following are homozygous dominant?

• BB

• Ll

• ww

• aa