Punnett Squares Practice ~ 2024

50%

What are the chances of an offspring being heterozygous?

Blue 25%, Brown 75%

A= Brown eyes a= Blue eyes

....

What are the chances of an offspring having blue eyes? What are the chances of an offspring having brown eyes?

Homozygous dominant: 0%
Homozygous recessive: 50%
Heterozygous: 50%

What are the chances of an offspring having:

~ homozygous dominant traits?

~ homozygous recessive traits?

~ heterozygous traits?

yellow 50%, green 50%

Y= yellow petals y= green petals

....

What are the chances of a flower having yellow petals? What are the chances of a flower having green petals?

heterozygous

Is this allele, Rr, homozygous dominant, homozygous recessive, or heterozygous?

homozygous dominant

Is this allele, RR, homozygous dominant, homozygous recessive, or heterozygous?

homozygous recessive

Is this allele, rr, homozygous dominant, homozygous recessive, or heterozygous?

dominant

Fill in the blank: If a ______________ trait is present, it will be expressed or seen.

dominant trait

What kind of trait is represented by a capital letter?

recessive

Fill in the blank: A ______________ trait will only be expressed when there are no dominant traits present.

recessive trait

What kind of trait is represented by a lowercase letter?

homozygous dominant

A set of alleles where both are dominant (BB)

homozygous recessive

A set of alleles where both are recessive (bb)

heterozygous

A set of alleles where one is recessive and one is dominant (Bb)

50% heterozygous and 50% homozygous recessive

Fill in the blanks: A heterozygous allele (parent) crossed with a homozygous recessive allele (parent). There is a ____% chance of having a heterozygous offspring.

There is a ____% chance of a homozygous recessive offspring.