1.
If a pea plant were homozygous recessive for height, how would its alleles be represented?
A. 
B. 
C. 
D. 
2.
Genes that are located on the sex chromosomes are called ___.
A. 
B. 
C. 
D. 
3.
A plant that is homozygous for red flowers (rr) is crossed with a plants that is homozygous for white flowers (ww). In the case of incomplete dominance, the flowers of the offspring will be ___.
A. 
B. 
C. 
D. 
4.
The term for a cross that involves just one trait, such as flower color, is ___.
A. 
B. 
C. 
D. 
5.
When an organism has two alleles at a particular locus that are different, the organism is called
A. 
B. 
C. 
D. 
6.
An allele is dominant in a heterozygote when it is
A. 
Expressed and the other allele is not.
B. 
A very common allele in the population.
C. 
The weaker of the two alleles.
D. 
More desirable than the other allele.
7.
Hair color and eye color are examples of a person's
A. 
B. 
C. 
D. 
8.
What do the letters inside the grid of a Punnett square represent?
A. 
B. 
C. 
Test-crosses of offspring
D. 
9.
Which law states that organisms inherit two copies of each gene and donate one copy to each of their offspring?
A. 
B. 
C. 
Law of independent assortment
D. 
10.
Recessive alleles may not be expressed because they are
A. 
Masked by the dominant allele.
B. 
The least common allele in a population.
C. 
The most common allele in a population.
D. 
11.
Mendel's second law of genetics, the law of independent assortment, is one explanation of the
A. 
Random fertilization of gametes.
B. 
Genetic variation within species.
C. 
Greater strength of dominant alleles.
D. 
Final stages of gametogenesis.
12.
Two parents have the genotype Gg for a genetic disorder caused by a dominant allele. What is the chance that any of their children will inherit the disorder?
A. 
B. 
C. 
D. 
13.
For an XX female to express a recessive sex-linked trait, she must have
A. 
B. 
C. 
D. 
14.
A child is born with attached earlobes, which is a recessive phenotype. Which of the following genotypes could the parents have?
A. 
B. 
C. 
D. 
15.
What is the main reason that sex-linked disorders are most often observed in males?
A. 
The X chromosome only has genes for genetic disorders.
B. 
The Y chromosome cannot have genes that cause genetic disorders.
C. 
The Y chromosome cannot mask alleles on the X chromosome.
D. 
The X chromosome has genes only for sex determination.
16.
Which pair of genes in Figure 6.2 would be most likely to be inherited together?
A. 
B. 
C. 
D. 
17.
Any of the alternative forms of a gene that occurs at a specific place on a chromosome are known as ___.
A. 
B. 
C. 
D. 
18.
A chart or "family tree" that tracks which members of a family have a particular trait is called a ___.
A. 
B. 
C. 
D. 
19.
___ studied traits of pea plants and discovered the two fundamental laws of genetics.
A. 
B. 
C. 
D. 
20.
___ is a pattern of inheritance in which one allele is not completely dominant over the other, thereby creating a blended phenotype.
A. 
B. 
C. 
D. 
21.
___ is a pattern of inheritance in which two alleles are equally dominant, thereby creating a blotchy phenotype.
A. 
B. 
C. 
D. 
22.
___ is a pattern of inheritance in which more than two alleles are possible, thereby creating a several possible genotypes and phenotypes.
A. 
B. 
C. 
D. 
23.
___ is a pattern of inheritance in which the gene for a trait is located on the X-chromosome, thereby creating disorders that are much more common in males than females.
A. 
B. 
C. 
D. 
24.
The generation of offspring derived from the parental generation is called the ___.
A. 
B. 
C. 
D. 
25.
The generation of offspring derived from the first filial generation is called the ___.
A. 
B. 
C. 
D.