Genetics PreTest

What is heredity?

• A kind of genetic disorder
• The way DNA divides
• A trait you inherit from your parents
• The passing down of traits from parents to children

Two identical alleles for a trait is known as

• homozygous

• heterozygous

• mutation

• codominance

A physical appearance is

• genotype

• heterozygous

• phenotype

• codominance

Which statement describes does Pp?

• two dominant alleles

• heterozygous alleles

• one dominant allele

• two dominant and recessive alleles

What does a Punnett Square determine?

• all of Mendel's discoveries about genetic crosses

• all the outcomes of a genetic cross

• only the recessive allele combinations

• only the dominant allele combinations

Genotype is

• stem height

• feather color

• physical appearance

• genetic makeup

The term that relates to physical characteristics that are studied in genetics.

• traits

• offspring

• generations

• hybrids

Factors that control traits are

• purebreds

• genes

• recessives

• parents

If a homozygous dominant black cat is crossed with a homozygous recessive white cat (bb), what is the probability of having a cat with white fur?

• 100%

• 0%

• 75%

• 25%

G = green, g = yellow
The genotype for a yellow plant is...

• GG
• Gg
• gg
• all of the choices result in yellow