Biology S2 Final Review

If A= tall plants and a= short plants, if we crossed 2 heterozygous parents, what percentage would have tall plants?

• 25%

• 50%

• 75%

• 100%

The physical appearance of an organism is known as its ________.

• phenotype

• genotype

• genetic makeup

• allele

If one form of a gene can overpower or mask another form, it is ______.

• frequent

• recessive

• dominant

• rare

The genetic makeup of an individual is its ______.

• phenotype

• genotype

• punnett square

• dominance

Which of the following is a homozygous dominant genotype?

• TT

• tt

• Tt

• tasting PTC paper

An allele whose trait only shows up when no dominant allele is present.

• hidden allele
• dominant allele
• recessive allele
• present allele

Which of the following genotypes is heterozygous?

• Bb

• BB

• bb

Aa, DD, Ba, and yy are all examples of ---

• genotypes

• phenotypes

Brown eyes are dominant over blue eyes. What is the probability that the offspring will have brown eyes in this cross?

• 25%

• 50%

• 75%

• 100%

Heterozygous is when...

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