Genetics

Front

What are homozygous alleles?

Back

Homozygous alleles are two identical alleles for a particular gene, such as 'ww' or 'BB'.

Front

What is the number of chromosomes in a human egg cell?

Back

A human egg cell contains 23 chromosomes.

Front

What is a dominant trait?

Back

A dominant trait is a characteristic that is expressed when at least one dominant allele is present, represented by a capital letter (e.g., 'B').

Front

What is a recessive trait?

Back

A recessive trait is a characteristic that is expressed only when two recessive alleles are present, represented by a lowercase letter (e.g., 'b').

Front

What is a phenotype?

Back

A phenotype is the observable physical or biochemical characteristics of an organism, such as color or shape.

Front

What is a genotype?

Back

A genotype is the genetic makeup of an organism, represented by the alleles it possesses (e.g., 'BB', 'Bb', or 'bb').

Front

What is the difference between dominant and recessive alleles?

Back

Dominant alleles mask the effect of recessive alleles in a heterozygous genotype.

Front

What is an allele?

Back

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

Front

What does it mean to be heterozygous?

Back

Heterozygous means having two different alleles for a particular gene, such as 'Bb'.

Front

What is a Punnett square?

Back

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