MonoDihybrid Crosses

B=brown eyes
b= blue eyes
What is true about these two brothers that have brown eyes:
One has genotype BB the other Bb.

• they have same phenotype and genotype
• they have different genotypes and phenotypes
• they have same phenotype but different genotypes
• they have same genotype but different phenotypes

Objective #5

(B-brown eyes & b-blue eyes)

Cross (Dad)Bb X (Mom)BB.

List the possible genotypes from this cross.

• BB, Bb, bb

• BB

• BB, Bb

• bb,Bb

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

What goes in box 3

• Aabb

• AABB

• AAbb

• aaBb

What genotype is missing from this Punnett Square?

• RrYy
• RRYY
• rryy
• RrYY

Based off this punnett square, what fraction of the offspring will have wrinkled, yellow seeds?

• 9/16
• 3/16
• 1/16
• 16/16

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?

• 3/16
• 4/16
• 8/16
• 12/16

This image is an example of a _____________ cross.

• Monohybrid

• Dihybrid

• Purebred

• Pure Breeding

A white mouse with red eyes is crossed with a black mouse with brown eyes. The white mouse is recessive for both of its traits. The black mouse is dominant for both of its traits.

This cross would be

• BBEE x bbee

• BBEe x BbEe

• BbEE x BbEe

• BBee x BBEE

In cacti, long arms (A) are dominant to short arms (a).  Suppose 2 heterozygous cacti are crossed.  What percentage of their offspring are expected to have short arms?

• 0%
• 25%
• 75%
• 100%