Genetics Dihybrid Cross

In mice black fur color (B) is dominant over brown fur color(b).In a cross between two heterozygous mice

what is the probability of a black male mouse?

• 1/2

• 1/4

• 3/4

• 3/8

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

In mice black fur color (B) is dominant over brown fur color(b).In a cross between two heterozygous mice

What is the probability of 3 brown colored mice?

• 1/8

• 1/16

• 1/64

• 3/64

• 27/64

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

In pea plants tall stems(T) are dominant over short stems(t) and round seeds(R) are dominant over wrinkled seeds(r). Consider the following cross: TtRr X Ttrr

Next 4 questions will be about this information. Please take notes.

a. Find the number of possible phenotypes

• 2

• 4

• 6

• 8

Tags

NGSS.HS-LS3-3

b. Find the number of possible genotypes

• 2

• 4

• 6

• 9

Tags

NGSS.HS-LS3-3

c. What is the chance of having tall, wrinkled seeded plants?

• 1/4

• 1/8

• 3/4

• 3/8

Tags

NGSS.HS-LS3-3

NGSS.HS-LS4-3

d. what is the chance of plant to have homozygous recessive genotype?

• 1/2

• 1/4

• 1/8

• 3/8

Tags

NGSS.HS-LS3-3

In a cross between a round(R)-yellow(Y) seeded plant and a wrinkled (r)- yellow(Y) seeded pea plant, green(y)-wrinkled (r) seeded offspring are produced.

(Next 2 questions will be about this information.)

a. What are the genotypes of parents?

• RrYy X rrYy

• RrYY X rrYy

• RrYy X RrYy

• RRYy X rrYy

• RRYy X RrYY

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

b.Find the probability of having round-green seeded plants.

• 1/4

• 1/8

• 3/8

• 9/16

Tags

NGSS.HS-LS4-3

Plant I ( GgNnRr) X Plant II ( GgNnRr) are crossed. what is the proportion of the F1 will;

(Next 5 questions will be about that information)

a. be dominant for all 3 characteristics?

• 1/8

• 1/64

• 9/64

• 27/64

Tags

NGSS.HS-LS3-3

b. have a genotype GGNnrr?

• 1/8

• 1/64

• 2/64

• 12/64

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3