Genetics

Front

What is the definition of a hybrid organism?

Back

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

Front

What does phenotype refer to?

Back

The physical trait or appearance of an organism.

Front

What is a homozygous organism?

Back

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

Front

What is a heterozygous organism?

Back

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

Front

What is the genotype of an organism?

Back

The genetic makeup or code of an organism.

Front

If a homozygous dominant dog (BB) is crossed with a heterozygous dog (Bb), what are the possible genotypes of the offspring?

Back

50% BB and 50% Bb.

Front

What fraction of offspring will have white hair if a horse with WW is crossed with a horse with ww?

Back

All offspring will have white hair.

Front

What does it mean if a trait is sex-linked?

Back

The trait is associated with a gene located on a sex chromosome.

Front

What is the difference between dominant and recessive alleles?

Back

Dominant alleles mask the effect of recessive alleles in heterozygous conditions.

Front

What is the purpose of a Punnett square?

Back

To predict the genotypes and phenotypes of offspring from a genetic cross.