3. Genetics and Inheritance

Patterns Of Inheritance — Quiz

Test your understanding of patterns of inheritance with 5 practice questions.

Practice Questions

Question 1

In a certain plant species, flower color is determined by two genes. Gene A controls pigment production (A = pigment, a = no pigment), and gene B controls pigment color (B = red, b = blue). If a plant has the genotype $AaBb$, what is the expected phenotypic ratio of the offspring from a cross between two $AaBb$ plants, assuming gene A is epistatic to gene B?

Question 2

In a species of insects, eye color is determined by two genes. Gene E controls pigment production (E = pigment, e = no pigment), and gene F controls pigment color (F = black, f = gray). If an insect has the genotype $EeFf$, what is the expected phenotypic ratio of the offspring from a cross between two $EeFf$ insects?

Question 3

In a certain plant species, seed color is determined by two genes. Gene P controls pigment production (P = pigment, p = no pigment), and gene Q controls pigment color (Q = green, q = yellow). If a plant has the genotype $PpQq$, what is the expected phenotypic ratio of the offspring from a cross between two $PpQq$ plants, assuming gene P is epistatic to gene Q?

Question 4

In humans, a certain trait is determined by three genes, each with two alleles. Each dominant allele contributes equally to the trait. If an individual has the genotype $AaBbCc$, how many total contributing alleles does this individual have?

Question 5

In a species of animals, coat color is determined by two genes. Gene M controls pigment production (M = pigment, m = no pigment), and gene N controls pigment color (N = black, n = brown). If an animal has the genotype $MmNn$, what is the expected phenotypic ratio of the offspring from a cross between two $MmNn$ animals, assuming gene M is epistatic to gene N?