Genetics Review

Front

What does heterozygous mean?

Back

When an organism has two different alleles for a trait (ex. Tt).

Front

What controls genetic traits?

Back

Genes.

Front

What does homozygous mean?

Back

When an organism has two of the same alleles for a trait (ex. RR or rr).

Front

What is a genotype?

Back

The genetic makeup of an organism, represented by letters (e.g., TT, Tt, tt).

Front

What is a phenotype?

Back

The physical appearance or observable traits of an organism (e.g., tall or short).

Front

What does dominant mean in genetics?

Back

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

Front

What does recessive mean in genetics?

Back

A recessive allele is one that only expresses its trait when paired with another recessive allele.

Front

What is a Punnett Square?

Back

A diagram used to predict the outcome of a genetic cross by showing the possible combinations of alleles.

Front

What does the letter 'L' represent in genetics?

Back

It can represent a dominant allele, such as long tails in monkeys.

Front

What does the letter 'l' represent in genetics?

Back

It can represent a recessive allele, such as short tails in monkeys.