Unit 7 Genetics Test Review

Front

What is the genotype of an individual with attached earlobes?

Back

The genotype is 'ff'.

Front

What does it mean for a trait to be dominant?

Back

A dominant trait is one that is expressed in the phenotype even when only one copy of the allele is present.

Front

What is the phenotype of a flower with the genotype Rr?

Back

The phenotype would be red if R (red) is dominant over r (white).

Front

What is a Punnett square used for?

Back

A Punnett square is used to predict the genotypes and phenotypes of offspring from a genetic cross.

Front

What is the probability of having an albino mouse from a cross of AaBb x AaBb?

Back

The probability is 1/16.

Front

What are the possible blood types of a child from a mother with type AO and a father with type BO blood?

Back

The possible blood types are A, B, AB, or O.

Front

What does the term 'homozygous' mean?

Back

Homozygous refers to having two identical alleles for a particular gene.

Front

What does the term 'heterozygous' mean?

Back

Heterozygous refers to having two different alleles for a particular gene.

Front

What is the significance of a recessive allele?

Back

A recessive allele is only expressed in the phenotype if two copies are present.

Front

What is the expected phenotype ratio in a monohybrid cross?

Back

The expected phenotype ratio is typically 3:1 for dominant to recessive traits.