Dihybrid Crosses and Linked Genes

This picture is an example of what type of dominance?

• incomplete dominance

• codominance

• regular dominance

• it is recessive

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

Tags

NGSS.HS-LS3-3

What would be the possible gametes for this parent: HhBB

• HB, hb, hb, hb

• HB, Hb, hB, hb

• HB, HB, hB, hb

• HB, HB, hB, hB

Tags

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

What goes in box 15

• aabb

• AABB

• aaBB

• AAbb

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

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%

If results of recombination do NOT follow Mendel's Law of Independent Assortment, genes are likely to be - - - 

• shuffled during meiosis
• linked
• inherited
• on separate chromosomes

Tags

NGSS.HS-LS3-2

Which genes are most likely linked?

• genes 1 & 2
• genes 2 & 3
• genes 3 & 4
• genes 1 & 4

Tags

NGSS.HS-LS3-1

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

• 25%
• 50%
• 0%
• 75%

Tags

NGSS.HS-LS3-3

A green pea plant (GG) is being crossed with a green pea plant (Gg). What is the phenotype?

• 100 % rainbow 
• 50% yellow and 50% green 
• 100% green
• 100% yellow 

Tags

NGSS.HS-LS3-1