Unit 3 Review

A homozygous dominant dog with brown fur is crossed with a heterozygous dog with brown fur. What are the percentages of the possible genotypes?

• 100% BB
• 75% BB and 25%Bb
• 50 % BB and 50% Bb
• 50% Bb and 50% bb

Who is considered the "father" of modern genetics?

• Einstein

• Mendel

• Disney

• Washington

TT,tt,PP,pp,SS,ss are examples of alleles that are?

• homozygous
• heterozygous
• different
• homologous 

The exact genetic makeup of an organism, such as RR, Tt, PP is its?

• phenotype
• dominance
• genotype
• trait

Y for yellow body is dominant over y for blue body.  What alleles would produce yellow bodies?

• YY,yy
• Yy,yy
• YY only
• YY,Yy

Females-XX; MalesXY.  A couple has 4 girls.  What is the chance the next child will be a boy?

• 75%
• 100%
• 25%
• 50%

If "T" is the allele for tall and "t" is the allele for short, then Tt would produce?

• tall
• short
• medium
• not enough info

A physical characteristic that can be passed from parent to offspring.

• behavior
• trait
• strong muscles
• ability to fly a plane.

Aa is

• homozygous (purebred)
• heterozygous (hybrid)

Which of the following is a phenotype?

• Aa
• red hair
• heterozygous genes
• mutated DNA