Punnett Squares

What ratio of the offspring from the cross shown will be homozygous recessive for the  trait of tallness? 

• 0 in 4
• 1 in 4
• 2 in 4
• 4 in 4

Which of the following genotypes is homozygous dominant?

• A
• Aa
• AA
• aa

Which of the following genotypes is heterozygous?

• Bb
• BB
• bb
• B

T - tall and t = short
In the punnett square below, what belongs in the missing square

• tt
• Tt
• Bb
• TT

Aa is

• homozygous
• heterozygous

Which of the following is homozygous dominant?

• Yy
• Y
• yy
• YY

Which of the following is homozygous recessive?

• Tt
• tt
• TT
• T