Genetics (Ch 11 & 14) Review

If an organism's diploid number is 24, what is its haploid number?

• 6

• 12

• 24

• 48

Meiosis results in

• 2 haploid daughter cells.

• 4 haploid daughter cells.

• 2 diploid daughter cells.

• 4 diploid daughter cells.

Two plants with the genotype PP and Pp

• would have the same phenotype.

• would have different phenotypes.

• have all dominant alleles.

• have all recessive alleles.

Organisms that have two identical alleles for a particular trait are said to be

• hybrid.

• homozygous.

• heterozygous.

• dominant.

Which of the following undergo meiosis?

• sperm cells

• liver cells

• unicellular organisms

• all of these

An organism's expressed physical traits, such as hair color or shape, are called its ______

• genotype.

• phenotype.

• allele.

• gametes.

What is an allele?

• a version of a gene

• a type of mutation

• a type of cell

• a blood type

What is the approximate probability that a human offspring will be female?

• 10%

• 25%

• 50%

• 75%

What is the probability that a human sperm cell will carry an X chromosome?

• 0%

• 25%

• 50%

• 100%

A pedigree CANNOT be used to

• determine whether a trait is inherited.

• show how a trait is passed from one generation to the next.

• determine whether an allele is dominant or recessive.

• none of the above.