Genetics Review

Front

What is a homozygous recessive allele?

Back

A homozygous recessive allele is a pair of identical alleles for a trait that are both recessive, represented as 'tt'.

Front

What is the genotype for a yellow plant if G = green and g = yellow?

Back

The genotype for a yellow plant is 'gg'.

Front

What is a pedigree?

Back

A pedigree is a diagram that shows the occurrence and appearance of phenotypes of a particular gene or organism and its ancestors.

Front

If you cross a horse with WW (white hair) and a horse with ww (non-white hair), what fraction of the offspring will have white hair?

Back

All of the offspring will have white hair.

Front

What does a filled-in square represent in a pedigree chart?

Back

A filled-in square represents an affected male.

Front

What is the difference between genotype and phenotype?

Back

Genotype refers to the genetic makeup of an organism, while phenotype refers to the observable traits.

Front

What is a Punnett Square used for?

Back

A Punnett Square is used to predict the genetic outcomes of a cross between two organisms.

Front

What does it mean if an organism is homozygous dominant?

Back

An organism is homozygous dominant if it has two identical dominant alleles for a trait, represented as 'TT'.

Front

What is the significance of the letter 'G' in genetics?

Back

In genetics, 'G' often represents a dominant allele, while 'g' represents a recessive allele.

Front

What is a karyotype?

Back

A karyotype is a visual representation of an individual's chromosomes, used to assess chromosomal abnormalities.