Biology I- 2nd Semester Final Review

Phenotype refers to the ___ of the individual.

• genetic makeup

• recessive alleles

• DNA

• physical appearance

The different forms of a gene are called __.

• traits

• pollinations

• alleles

• hybrids

Gregor Mendel's principles of genetics apply to ___.

• plants only

• all organisms

• pea plants only

• animals only

Organisms that have 2 identical alleles for a particular trait are said to be __.

• homozygous

• hybrid

• heterozygous

• dominant

If a flower's alleles for flower color are tt, what is true of its parents?

• both are recessive

• both contribute a recessive allele

• both contribute a dominant allele

• both are dominant

Two plants both heterozygous for tallness are mated to each other. What is the probability of having short offspring? (tall is dominant to short).

• 75%

• 25%

• 50%

• 0%

Red is dominant to white. A heterozygous red pea plant is crossed with a white plant. The probability that a plant will be red is?

• 50%

• 25%

• 100%

• 75%

Which of the following is considered to be a heterozygous genotype?

• AAbb

• AaBb

• AaBB

• aaBB

Which of the following is true about the offspring resulting from a cross between TT and Tt?

• about 3/4 are expected to be tall

• All are expected to be short

• About half are expected to be short

• All are expected to be tall

Unlike mitosis, meiosis results in the formation of:

• body cells

• diploid cells

• haploid cells

• 2N daughter cells