A dihybrid cross shows the possible outcomes of _______ 

• two alleles
• two parents
• two traits/characters
• a self pollination

A red flower (Rr) is crossed with a white flower (rr). What is the genotypic ratio?

• 0 RR; 0 Rr: 4 rr
• 2 RR; 0 Rr: 2 rr
• 4 RR; 0 Rr: 0 rr
• 0 RR; 2 Rr: 2 rr

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

T4 - Black fur in mice (B) is dominant to brown fur (b). Short tails (T) are dominant to long tails (t). What percentage of the offspring of the cross BbTt x BBtt will have black fur and long tails?

• 0%
• 25%
• 50%
• 100%

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?

• 12.5%
• 25%
• 50%
• 75%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

What gamete possibilities could come from this parent's genotype?

• AB, AB, aB, aB
• Ab, AB, Ab, ab
• Ab, Ab, Ab, Ab
• AB, aB, ab, aB

Tags

NGSS.HS-LS3-1

What gamete possibilities could come from this parent's genotype?

• aB, ab, AB, Ab
• aB, Ab, AB, AB
• AB, aB, AB, Ab
• aB, ab, aB, ab

Tags

NGSS.HS-LS3-1

What gamete possibilities could come from this parent's genotype?

• aB, ab, AB, Ab
• Ab, AB, Ab, AB
• AB, AB, Ab, AB
• Ab, AB, ab, aB

Tags

NGSS.HS-LS3-1

What goes in box 1

• AABb
• AABB
• aabb
• AaBb

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

What goes in box 3

• Aabb
• AABB
• AAbb
• aaBb

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS4-3

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-LS4-3