Unit 7 Review

Front

What is a phenotype?

Back

The physical trait of an organism.

Front

What are dominant alleles?

Back

Dominant alleles are represented by capital letters.

Front

What is the probability of offspring having homozygous alleles in a Punnett square?

Back

50%.

Front

What is the probability and phenotype of offspring with genotypes A (Brown hair) and a (Blond hair)?

Back

75% Brown Hair and 25% Blond Hair.

Front

What is the genotypic percentage resulting from a cross of BB, Bb, and bb?

Back

BB = 25%, Bb = 50%, bb = 25%.

Front

Define genotype.

Back

The genetic makeup of an organism.

Front

What is the difference between homozygous and heterozygous alleles?

Back

Homozygous alleles are identical (AA or aa), while heterozygous alleles are different (Aa).

Front

What does a Punnett square illustrate?

Back

A Punnett square illustrates the possible genetic combinations of offspring from two parents.

Front

What is the significance of capital letters in genetics?

Back

Capital letters represent dominant alleles.

Front

What is the significance of lowercase letters in genetics?

Back

Lowercase letters represent recessive alleles.