Genetics Quiz

Each question is timed. You cannot go back to a previous question. All questions must be answered in the order they are in. Type the phrase 'timed questions' as your response to show you have read the instructions.

___________ is a variation of a gene

How many letters does a genotype contain?

• 1
• 2
• 3
• 4

When multiple genes affect one phenotype, it is called

The alleles of a gene pair in a heterozygote are both expressed with no blending.

• codominance

• incomplete dominance

• polygenic

• multiple alleles

Which of the characteristics is a lion least likely to pass on to its offspring?

• fur color
• length of tail
• scars on leg
• body size

Mark is heterozygous. If B is for brown hair, and b is for blonde hair, what is Mark's phenotype?

• Brown Hair
• Blonde Hair
• Brown and Blonde Hair
• Black Hair

If the fur color gene in squirrels is incompletely dominant, what would you expect the offspring between a black squirrel and white squirrel be? Check all that apply

• Black and White

• Grey

• Black

• White

• None of the List Options

A brown mouse is mated with two female black mice. When each female has produced several litters of young, the first female had 48 black pups and the second female had 14 black and 11 brown pups. Which phenotype is dominant?

• Brown

• White

• Black

• BB

• Bb

A brown mouse is mated with two female black mice. When each female has produced several litters of young, the first female had 48 black pups and the second female had 14 black and 11 brown pups. What is the genotype of the male?

• BB

• Bb

• bb

• Cannot tell from information provided