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WorksheetsChapter 6 Test Review
Total questions: 20
Worksheet time: 40mins
Name
Class
Date
1.
How many chromosomes are in each human sex cell?
a)
20
b)
23
c)
46
d)
78
2.
Before Mendel's experiments about heredity, people explained how traits came from both parents with the idea of
a)
proportionate inheritance
b)
mixed inheritance
c)
blending inheritance
d)
Mendelian inheritance
3.
Which of the following traits are influenced by more than one gene?
a)
fur color in a white tiger
b)
the shades of human eye colors
c)
whether a pea seed is wrinkled or smooth
d)
whether a pea flower is purple or white
4.
What an organism looks like, or other detectable characteristics, is its
a)
genetic variable
b)
genotype
c)
phenotype
d)
allele
5.
What chromosomes carry the same set of genes, although they may have different alleles for each gene?
a)
twin chromosomes
b)
homologous chromosomes
c)
ordinary chromosomes
d)
asexual chromosomes
6.
What is a feature that has different forms in a population?
a)
cell
b)
characteristic
c)
nuclear membrane
d)
trait
7.
Some grasshoppers that eat certain plants develop yellow and black coloration because their environment influences their
a)
genotype
b)
phenotype
c)
chromosomes
d)
DNA
8.
What is one internal environmental condition that can influence a person's height?
a)
sunlight
b)
genotype
c)
age
d)
nutrition
9.
What is the Punnett square used to predict?
a)
possible genotypes for the cross
b)
which traits are dominant
c)
which traits are recessive
d)
the number of offspring
10.
If P is a dominant allele for purple flowers and p is a recessive allele for white flowers, what are the phenotypes for this cross?
a)
four purple flowers
b)
four white flowers
c)
two purple flowers and two white flowers
d)
three purple flowers and one white flower
11.
What is the probability that offspring of this cross will receive two p alleles?
a)
1/4 or 25%
b)
1/2 or 50%
c)
1/1 or 100%
d)
3/1 or 300%
12.
What are chromosomes that have the same sequence of genes?
a)
heterozygous
b)
homologous
c)
homozygous
d)
recessive
13.
What is a type of trait that disappears in the first generation and reappears in the second generation
a)
dominant
b)
recessive
c)
heterozygous
d)
homozygous
14.
A plant with two dominant or two recessive alleles for a characteristic are considered to be
a)
heterozygous
b)
recessive
c)
dominant
d)
homozygous
15.
What are cells without homologous pairs of chromosomes?
a)
diploid
b)
haploid
c)
heterozygous
d)
homologous
16.
What is a plant with one dominant and one recessive allele for a characteristic?
a)
homozygous
b)
dominant
c)
recessive
d)
heterozygous
17.
What is the combination of genes for a trait; formed by alleles inherited from each parent?
a)
mitochondria
b)
genotype
c)
gene
d)
trait
18.
What is a form of a characteristic that may be different in a population?
a)
mitochondria
b)
genotype
c)
gene
d)
trait
19.
Other than the nucleus, where DNA from the mother is found in the cells of offspring is the...
a)
mitochondria
b)
genotype
c)
gene
d)
trait
20.
What is a set of inherited instructions that can influence one or more traits?
a)
mitochondria
b)
genotype
c)
gene
d)
trait
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