Genetics Quiz 2

What is a genotype?

• an identical gene that is passed through generations

• the traits of an organism that can be observed

• the type of species-specific traits that are found in populations of organisms

• the genes within DNA that are responsible for a trait in an organism

What is a phenotype?

• a population of organisms who share similar DNA

• the arrangement of genes responsible for determining traits

• an observable expression of a trait in an organism

• a trait that is passed from the father to male offspring

What is a probable reason that a trait skips a generation?

• The trait is recessive.

• The trait is dominant.

• The trait has been amplified.

• The trait is extinct.

A pea plant has seeds that are green (G), the dominant color for this trait. If this plant always produces offspring with green peas, what is the probable genotype of the pea plant?

• Gg

• gg

• GG

• YY

What percent of the offspring in this Punnett Square are heterozygous?

• 100%

• 75%

• 50%

• 25%

The diagram above is of a Punnett Square for the cross between two guinea pigs. The mother is homozygous recessive for soft fur. The father is homozygous dominant for rough fur. What percent of the offspring will have soft fur?

• 75%

• 50%

• 25%

• 0%

R= red r= white. What percentage of flowers will be red?

• 25%

• 50%

• 75%

• 100%

Different forms of a gene are called

• alleles

• hybrid

• budding

• gamete

Children= blue eyes Dad= blue eyes (bb) Mom= brown eyes. (B?) What is mom's genotype?

• BB

• Bb

• bb

A homozygous dominant genotype is represented by

• WW

• Ww

• ww