Genetics Probability Quiz

A tall plant (Tt) is crossed with a tall plant (Tt). What is the probability of the offspring being short?

• 25%

• 50%

• 75%

• 100%

A purebred brown rabbit (BB) is crossed with a purebred white rabbit (bb). What percentage of the offspring will have brown fur?

• 25%

• 50%

• 75%

• 100%

A heterozygous black cat (Bb) is crossed with a white cat (bb). What is the probability of the offspring being white?

• 25%

• 50%

• 75%

• 100%

Two heterozygous round-seeded pea plants (Rr) are crossed. What percentage of the offspring will have wrinkled seeds?

• 25%

• 50%

• 75%

• 100%

Tags

NGSS.MS-LS3-2

A Homozygous Dominant purple flower (PP) is crossed with a heterozygous purple flower (Pp). What percentage of the offspring will have white flowers?

• A. 0%

• B. 25%

• C. 75%

• D. 100%

Tags

NGSS.MS-LS3-2

NGSS.MS-LS3-1

Two heterozygous curly-haired guinea pigs (Cc) are crossed. What is the probability of the offspring having straight hair?

• A. 25%

• B. 50%

• C. 75%

• D. 100%

A scientist crosses a plant with an unknown genotype for tallness (a dominant trait) with a short plant (tt). All offspring are tall. What is the genotype of the unknown plant?

• A. Tt

• B. TT

• C. tt

• D. All of the above.

Tags

NGSS.HS-LS3-1

Two heterozygous green pea plants (Gg) are crossed. What is the phenotypic ratio of green to yellow offspring?

• A. 1 green to every 1 yellow (1:1)

• B. 2 green to every 1 yellow (2:1)

• C. 3 green to every 1 yellow (3:1)

• D. 4 green to every 1 yellow (4:1)

A homozygous dominant red-eyed fruit fly (RR) is crossed with a heterozygous red-eyed fruit fly (Rr). What percentage of the offspring will be heterozygous?

• 25%

• 50%

• 75%

• 100%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Two heterozygous spotted cows (Ss) are crossed. What is the probability of the offspring being homozygous recessive?

• 25%

• 50%

• 75%

• 100%

Tags

NGSS.HS-LS3-3