Mendelian Genetics

One flower is heterozygous red (Rr) and it is crossed with a homozygous white (rr) plant. Use a Punnett square to determine the probability of one of their offspring having a red color.

• 0%

• 25%

• 50%

• 75%

Binary fission is important to the reproduction of what form of life?

• Euglena (An aquatic plant)

• Bacteria

• Protista

• Phytoplankton

How many unique gametes could be produced from a person with the genotype AABb?

• 1

• 3

• 2

• 4

• 5

The incomplete Punnett square below shows only one portion of the predicted outcomes for a cross between two mice for the trait of fur color. Agouti (A) is dominant over black (a) coloration. One parentis heterozygous; the other is homozygous recessive. Of the three empty portions of the Punnett square, how many will contain offspring with black coloration?

• Zero

• one

• two

• three

In certain rose plants, white roses and red roses are incompletely dominant to one another. When a red rose is crossed with a white rose, a pink rose will result. What is the probability of producing more pink roses from two pink parents?

• 0%

• 25%

• 50%

• 100%

Consider the normal somatic cell labeled X below containing 4 chromosomes. Which of the four cells below it represents a healthy gamete that could be produced from this cell?

• A

• B

• C

• D

A researcher is studying the genetics of plant characteristics. He crossed a red flowered plant with a white flowered plant. His results were 126 red flowering plants and 122 white flowered plants. Which punnett square could represent the observations?

• 1

• 2

• 3

• 4

A male with black hair, homozygous dominant, has offspring with a blonde woman. What are the ratios of genotypes found in the offspring?

• 50% Blonde and 50% Black

• 100% black

• 50% BB and 50% Bb

• 100% Bb

Yellow fruit (r) and dwarf vines (t) are recessive traits in tomatoes. Red fruit (R) and tall vines (T) are dominant. Complete a punnett square and determine the phenotype ratios for a completely dominant red and tall plant crossed with a heterozygous red and dwarf plant.

• 100% Red and tall

• 50% Tall and red / 50% Tall and yellow

• 50% RRTt and 50% RrTt

• 50% Tall and Yellow / 50% Short and Red

What is the purpose of interphase in the cell cycle?

• active growth and metabolism of the cell

• active cell growth and cytokinesis

• active division of the plasma membrane before mitosis

• None of the these