Genetics

Front

What is the probability of a blue-eyed child from two brown-eyed parents (Bb)?

Back

25%.

Front

What are the possible genotype percentages when a homozygous dominant dog (BB) is crossed with a heterozygous dog (Bb)?

Back

50% BB and 50% Bb.

Front

Which genotype is heterozygous?

Back

Bb.

Front

What is a phenotype?

Back

A phenotype is the observable physical characteristic, such as blue eyes.

Front

Which genotype is recessive?

Back

bb.

Front

Define homozygous.

Back

Homozygous refers to having two identical alleles for a particular gene (e.g., BB or bb).

Front

Define heterozygous.

Back

Heterozygous refers to having two different alleles for a particular gene (e.g., Bb).

Front

What is the difference between genotype and phenotype?

Back

Genotype is the genetic makeup (e.g., BB, Bb, bb), while phenotype is the physical expression of that genotype (e.g., brown eyes, blue eyes).

Front

What does it mean if a trait is dominant?

Back

A dominant trait is one that will express itself in the phenotype even if only one dominant allele is present (e.g., B in Bb).

Front

What does it mean if a trait is recessive?

Back

A recessive trait will only express itself in the phenotype if two recessive alleles are present (e.g., bb).