Dihybrid Cross

Cross Two Homozygous plants

(RRYY x rryy)

R = round seeds, r = wrinkled seeds Y = yellow seeds, y = green seeds

What is the probability for an offspring to have Round and Yellow seeds? [Answer in fraction]

Tags

NGSS.HS-LS3-3

NGSS.HS-LS4-3

In certain camels, one hump (H) is dominant over two humps (h) while long necks (N) are dominant over short necks (n). Cross a camel that is heterozygous for both traits with a camel that is homozygous recessive for hump & heterozygous for the neck.

What is the probability for an offspring to be homozygous recessive for both traits? [Answer in fraction]

Tags

NGSS.HS-LS3-2

NGSS.HS-LS3-3

A male beetle has the genotype Ttbb. If this beetle mates with a female with genotype TTBb, what is the chance their offspring will have the genotype TtBb? [Type the answer in fraction]

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

A male alligator has the genotype RrAa. If this alligator mates with a female with genotype RrAa, what is the chance their offspring will have the genotype rrAa? [Type the answer in fraction]

Tags

NGSS.HS-LS3-3

Cross Two Homozygous plants

(RrYy x rrYy)

R = round seeds, r = wrinkled seeds Y = yellow seeds, y = green seeds

What is the probability for an offspring to have Wrinkled and Green seeds? [Answer in fraction]

Tags

NGSS.HS-LS3-3

In a dihybrid cross involving two heterozygous parents (AaBb x AaBb), what is the phenotypic ratio of the F1 generation?

• 3:1

• 9:3:3:1

• 1:2:1

• 1:1:1:1

Cross Two Homozygous plants
(RRYY x rryy)
R = round seeds, r  = wrinkled seeds Y = yellow seeds, y = green seeds
What percent will have Round and Yellow seeds? 

• 0%

• 25%

• 50%

• 100%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

If B = brown hair and b = blonde hair, what is the probability of brown hair?

• 25%

• 50%

• 0%

• 75%

Tags

NGSS.HS-LS3-3

if mmrr was crossed with MmRr, choose the recombinant offspring that could occur.

• MmRr

• mmrr

• mmRr

• Mmrr

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

In a dihybrid cross between two heterozygous pea plants (RrYy x RrYy), what is the probability of obtaining offspring with wrinkled green seeds?

• 1/16

• 3/16

• 9/16

• 1/4

Tags

NGSS.HS-LS3-3