Genetics Day 2 Review

Front

What is incomplete dominance in genetics?

Back

Incomplete dominance is a form of inheritance where the phenotype of a heterozygote is intermediate between the phenotypes of the two homozygotes.

Front

What is codominance in genetics?

Back

Codominance is a form of inheritance where both alleles in a heterozygote are fully expressed, resulting in a phenotype that shows both traits.

Front

What does homozygous dominant mean?

Back

Homozygous dominant refers to an organism that has two identical dominant alleles for a trait (e.g., MM).

Front

What does a shaded circle represent on a pedigree chart?

Back

A shaded circle represents an affected female in a pedigree chart.

Front

If a red flowered plant (RR) is crossed with a white flowered plant (WW) and shows incomplete dominance, what will be the color of the offspring?

Back

The offspring will be pink (RW) flowers.

Front

What is the genotype of a plant that has pink flowers resulting from a cross between a red flower (RR) and a white flower (WW)?

Back

The genotype of the pink flower is RW.

Front

In a cross between a black male (BB) and a white female (WW) producing grey offspring, what type of inheritance is this?

Back

This is an example of incomplete dominance.

Front

What is the difference between incomplete dominance and codominance?

Back

In incomplete dominance, the phenotype is a blend of both alleles, while in codominance, both alleles are fully expressed.

Front

What is the phenotype of a plant with the genotype MM?

Back

The phenotype is dominant, showing the trait associated with the dominant allele.

Front

What does it mean if an organism is heterozygous?

Back

An organism is heterozygous if it has two different alleles for a particular gene (e.g., Rr).