Chapter 8:
Heredity
Practice Test
1.
What do scientists call the different forms that a gene can take?
a.
factors
b.
alternatives
c.
traits
d.
alleles
Hint
2.
What is the science of heredity?
a.
chemistry
b.
ecology
c.
evolution
d.
genetics
Hint
3.
When an organism has two of the same alleles for a given trait, it is said to be ___________ for that trait.
a.
homozygous
b.
heterozygous
c.
recessive
d.
dominant
Hint
4.
What is the form of a trait that controls or rules over another trait and appears in the F1 generation?
a.
hidden trait
b.
dominant trait
c.
predominant trait
d.
recessive trait
Hint
5.
What principle states that during gamete formation the pair of genes responsible for each trait separate so that each gamete receives only one gene for each trait?
a.
principle of separation
b.
principle of gamete formation
c.
principle of gametization
d.
principle of segregation
Hint
6.
Results of genetic crosses, such as between pea plants with purple and white flowers, can be predicted by using a chart called a _____________ .
a.
Punnett graph
b.
Punnett square
c.
Mendelian chart
d.
genetic table
Hint
7.
What is the passing of traits from parents to offspring?
a.
selection
b.
heredity
c.
diffusion
d.
osmosis
Hint
8.
Sometimes a trait has more than two alleles in a population. A trait governed by more than two alleles is controlled by ______________ .
a.
incomplete dominance
b.
codominance
c.
multiple alleles
d.
continuous variation
Hint
9.
Mendel crossed two purebred pea plants, one with white flowers and one with purple flowers. What color flowers did the offspring (the first filial generation, F1) have?
a.
pale purple
b.
pink
c.
purple
d.
white
Hint
10.
Besides sex chromosomes, what are all the other chromosomes called?
a.
recessive genes
b.
homozygous chromosomes
c.
dominant genes
d.
autosomes
Hint
