Monohybrid & Dihybrid Practice

Front

What is a monohybrid cross?

Back

A genetic cross between individuals that differ in one trait.

Front

What is a dihybrid cross?

Back

A genetic cross between individuals that differ in two traits.

Front

What does dominant mean in genetics?

Back

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

Front

What does recessive mean in genetics?

Back

A recessive trait is one that is expressed in the phenotype only when two copies of the allele are present.

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 homozygous mean?

Back

An organism that has two identical alleles for a trait (e.g., TT or tt).

Front

What does heterozygous mean?

Back

An organism that has two different alleles for a trait (e.g., Tt).

Front

What is the probability of getting a white fur offspring from a cross of Bb x Bb?

Back

50%.

Front

In a cross of RRYY x rryy, what percent of the offspring will have round and yellow seeds?

Back

100%.

Front

What is the genotype for an organism with brown fur if brown is dominant?

Back

It can be either BB (homozygous) or Bb (heterozygous).