Genetics - Class review

Front

What is a homozygous dominant genotype?

Back

A genotype with two identical dominant alleles, represented as 'AA'.

Front

What is a phenotype?

Back

The physical appearance or observable traits of an organism.

Front

What is a monohybrid cross?

Back

A genetic cross between parents that differ in one trait, typically involving one pair of alleles.

Front

What percentage of offspring are expected to be homozygous recessive in a monohybrid cross of Aa x Aa?

Back

25%.

Front

What is a heterozygous genotype?

Back

A genotype with two different alleles for a trait, represented as 'Qq'.

Front

What is a homozygous recessive genotype?

Back

A genotype with two identical recessive alleles, represented as 'aa'.

Front

What does the term 'allele' mean?

Back

An allele is a variant form of a gene that can produce different traits.

Front

What is the difference between genotype and phenotype?

Back

Genotype refers to the genetic makeup of an organism, while phenotype refers to the physical expression of that genotype.

Front

What is the expected genotype ratio from a monohybrid cross?

Back

1 homozygous dominant : 2 heterozygous : 1 homozygous recessive.

Front

What does 'dominant' mean in genetics?

Back

A dominant allele is one that expresses its trait even when paired with a recessive allele.