Genetics

Front

What is the genotype for an individual with a purple phenotype if green is dominant?

Back

gg

Front

What does it mean to be homozygous?

Back

Having two of the same genes for a trait (purebred).

Front

What is the probability of offspring having short tusks when a heterozygous long-tusked elephant is crossed with a homozygous recessive short-tusked elephant?

Back

50%.

Front

Why are there no white rabbit babies?

Back

It takes two recessive genes to show the trait.

Front

What is the probability of offspring having long hair when one dog is homozygous long-haired (SS) and its mate is homozygous short-haired (ss)?

Back

100%.

Front

What is a Punnett square used for?

Back

To predict the genetic outcomes of a cross between two individuals.

Front

Define heterozygous.

Back

Having two different genes for a trait.

Front

What is the difference between dominant and recessive traits?

Back

Dominant traits are expressed when at least one dominant allele is present; recessive traits require two recessive alleles to be expressed.

Front

What is an allele?

Back

An allele is a variant form of a gene.

Front

What does it mean if a trait is considered 'purebred'?

Back

It means the organism is homozygous for that trait.