Biology Semester 2 Midterm

A heterozygous long-tusked elephant is crossed with a homozygous recessive short-tusked elephant. What is the probability of the offspring having short tusks?

• 0%
• 25%
• 50%
• 75%

Dominant or recessive?
tt

• Dominant 
• Recessive

Gregor Mendel is often called ....

• The father of heredity.
• The father of genetics.
• The king of peas
• The father of punnett squares.

Why do scientist use Punnett Squares?

• A tool scientist use to to see alleles

• A tool scientist use to see which alleles are dominant

• A tool scientist use to determine possible genotypes for offspring

Which of the following is a Homozygous Dominant Genotype?

• Yy

• XX

• zz

Which of the following is a homozygous recessive genotype?

• HH

• dd

• Aa

In a flowering plant species, red flower color (R) is dominant over white flower color (r). What is the genotype of any white-flowering plant resulting from this species?

• rr

• rR

• RR

• Rr

Which of the following genotypes is homozygous recessive?

• Tt

• tt

• TT

• tT

Which of the following genotypes is homozygous dominant?

• Yy

• yY

• yy

• YY

Which of the following genotypes is heterozygous?

• Bb
• BB
• bb
• B