Biology EOC Review. MO

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 from the parents.

Front

What does homozygous mean?

Back

Homozygous refers to having two identical alleles for a particular gene, such as AA or aa.

Front

What does heterozygous mean?

Back

Heterozygous refers to having two different alleles for a particular gene, such as Aa.

Front

What is incomplete dominance?

Back

Incomplete dominance is a genetic situation in which one allele does not completely dominate another allele, resulting in a phenotype that is a blend of the two.

Front

What is codominance?

Back

Codominance is a genetic situation where both alleles in a heterozygote are fully expressed, resulting in a phenotype that shows both traits.

Front

What is the role of the cell membrane?

Back

The cell membrane controls the movement of substances in and out of the cell, allowing certain things to pass while blocking others.

Front

What is an allele?

Back

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

Front

How many alleles does an offspring receive from each parent?

Back

An offspring receives one allele from each parent for a specific trait.

Front

What is the difference between dominant and recessive alleles?

Back

A dominant allele is expressed in the phenotype even if only one copy is present, while a recessive allele is only expressed if two copies are present.

Front

What does it mean for an allele to be dominant?

Back

A dominant allele is one that masks the effect of a recessive allele in a heterozygous genotype.