Punnett Square Genetics #1

Dominant or recessive?
tt

• Dominant 
• Recessive

Dominant or recessive?
Dd

• Dominant
• recessive
• neither
• homozygous

What are the possible combinations of a pea plant with the alleles PP and a male pea plant with the alleles pp.
P= purple
p= white

• all Pp
• all PP
• Pp,PP,Pp,PP
• all pp

When the allele combination is a dominate and a recessive trait together which trait will be seen?

• Dominate
• Recessive
• none
• both

Homozygous is when...

• the alleles are the same
• the alleles are different
• the alleles are absent
• the alleles are present

B = brown fur  b = white fur
In the punnett square, what is the probability for white fur? 

• 0%
• 25%
• 50%
• 75%

Aa is

• homozygous (purebred)
• heterozygous (hybrid)

What is a phenotype?

• The expression of a trait; physical appearance.
• refers to the genetic makeup of an individual
• An organism that has the same genes for a trait (ex. TT or tt)
• the passing of traits from parent to offspring

This means Different Gene

• Dominant
• Recessive
• Homozygous
• Heterozygous

Homozygous or heterozygous?
BB

• Homozygous
• Heterozygous