Genetics test review

Front

What are an individual's traits determined by?

Back

genes

Front

In humans, the ability to roll one's tongue is dominant over the inability to do so. Two parents that are both heterozygous for tongue rolling have children. What are all possible genotypes of the children?

Back

RR, Rr, rr

Front

Brown fur is dominant over white fur in dogs. Two white dogs are crossed. What are all possible phenotypes of the puppies?

Back

all white

Front

Freckles are dominant over not having freckles. If the following cross occurred, Ff x Ff, what percentage of the offspring would you expect to NOT have freckles?

Back

25%

Front

Red and white flowers cross and produce pink flowers. (Incomplete dominance). If two pink flowers are crossed, show all possible genotypes of the offspring.

Back

RR, RW, WW

Front

A father is heterozygous for right-handedness. The mother is homozygous for right-handedness. What percent of the children are expected to be homozygous for right-handedness?

Back

50%

Front

An organism’s genetic makeup; the pair of alleles for a trait is called a(n)

Back

genotype

Front

Two identical alleles for a trait is known as

Back

homozygous

Front

What is the definition of phenotype?

Back

The physical expression of a trait

Front

In rabbits, black fur (B) is dominant over brown fur (b). If a rabbit has brown fur, what can you conclude about its genotype?

Back

It is bb.