Review Genetics

Front

What is a homozygous recessive allele?

Back

A homozygous recessive allele consists of two identical recessive alleles, such as 'bb'.

Front

What is heredity?

Back

Heredity is the passing down of traits from parents to their children.

Front

What does it mean if an allele is dominant?

Back

A dominant allele is expressed if at least one copy is present, such as 'T' in pea plants.

Front

What is a phenotype?

Back

A phenotype is the observable physical or biochemical characteristics of an organism, such as 'blue eyes'.

Front

What is a dominant trait?

Back

A dominant trait is a characteristic that is expressed if at least one dominant allele is present.

Front

What is a genotype?

Back

A genotype is the genetic makeup of an organism, represented by alleles such as 'AA', 'Aa', or 'aa'.

Front

What is the difference between homozygous and heterozygous?

Back

Homozygous means having two identical alleles for a trait (e.g., 'BB' or 'bb'), while heterozygous means having two different alleles (e.g., 'Bb').

Front

What is an allele?

Back

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

Front

What is the significance of the letter 'T' in genetics?

Back

In genetics, 'T' often represents a dominant allele, such as the tall allele in pea plants.

Front

What does it mean for a trait to be recessive?

Back

A recessive trait is only expressed when two copies of the recessive allele are present (e.g., 'tt').