Genetics and Ans

Biology Test- Chapter 11: Introduction to Genetics

Multiple Choice
Identify the choice that best completes the statement or answers the question.

1. Gregor Mendel used pea plants to study
a.
flowering.
b.
gamete formation.
c.
the inheritance of traits.
d.
cross-pollination.

2. Offspring that result from crosses between true-breeding parents with different traits
a.
are true-breeding.
b.
make up the F2 generation.
c.
make up the parental generation.
d.
are called hybrids.

3. The chemical factors that determine traits are called
a.
alleles.
b.
traits.
c.
genes.
d.
characters.

4. Gregor Mendel concluded that traits are
a.
not inherited by offspring.
b.
inherited through the passing of factors from parents to offspring.
c.
determined by dominant factors only.
d.
determined by recessive factors only.

5. When Gregor Mendel crossed a tall plant with a short plant, the F1 plants inherited
a.
an allele for tallness from each parent.
b.
an allele for tallness from the tall parent and an allele for shortness from the short parent.
c.
an allele for shortness from each parent.
d.
an allele from only the tall parent.

6. The principle of dominance states that
a.
all alleles are dominant.
b.
all alleles are recessive.
c.
some alleles are dominant and others are recessive.
d.
alleles are neither dominant nor recessive.

7. When Gregor Mendel crossed true-breeding tall plants with true-breeding short plants, all the offspring were tall because
a.
the allele for tall plants is recessive.
b.
the allele for short plants is dominant.
c.
the allele for tall plants is dominant.
d.
they were true-breeding like their parents.

8. A tall plant is crossed with a short plant. If the tall F1 pea plants are allowed to self-pollinate,
a.
the offspring will be of medium height.
b.
all of the offspring will be tall.
c.
all of the offspring will be short.
d.
some of the offspring will be tall, and some will be short.

9. The principles of probability can be used to
a.