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Cells And Inheritance
Test Description: Test for science
Instructions: Answer all questions to get your test result.
1) What are multiple alleles?
A
three or more chromosomes that determine a trait
B
two genes that control a trait
C
more than two co-dominant genes in a chromosome
D
three or more forms of a gene that code for a single trait
2) Why does height in humans have such a wide variety of phenotypes?
A
Height is controlled by multiple alleles
B
Height is controlled by a recessive allele
C
Height is controlled by sex-linked genes
D
The gene for height has only two alleles
3) Which of these human traits can be altered by variations in the enviornment
A
height
B
hairline
C
blood type
D
smile dimples
4) Which combination of sex chromosomes results in a male?
A
either XX or YY
B
XY
C
YY
D
XX
5) What is a pedigree?
A
a chart that tracks which members of a family have a particular trait
B
a picture of all of the chromosomes in a cell
C
an allele passed from parent to child on a sex chromosome
D
a geneticist who studies the inheritance of traits in humans
6) Genetic disorders are caused by:
A
pedigrees
B
mutations
C
sickle-shaped cells
D
dominant alleles
7) What is a karyotype?
A
a picture of a baby before it is born
B
fluid that surrounds a baby before it is born
C
blood from a newborn baby
D
a picture of the chromosomes in a cell
8) There are at least how many genes in each cell?
A
15,000
B
35,000
C
46
D
25,000
9) No two people have the same DNA, except for:
A
identical twins
B
sisters
C
brothers
D
crime suspects
10) What is a genome?
A
all the DNA in one cell of an organism
B
all the cells produced during meiosis
C
all the plasmids from splicing DNA in a cell
D
all the karyotypes in a cell
11) Sex-linked genes are genes on:
A
the X chromosome only
B
the X and Y chromosomes
C
the Y chromosome only
D
all 23 pairs of chromosomes
12) A carrier is a person who has:
A
two dominant alleles for a trait
B
one recessive and one dominant allele for a trait
C
more than two alleles for a trait
D
two recessive alleles for a trait
13) DNA is replicated
A
before meiosis begins
B
during cytokinesis
C
at the end of meiosis.
D
during meiosis.
14) A person’s surroundings, or _________________, can change the effects of a person’s genes.
A
all of the above
B
diet
C
amount of sleep
D
enviornment
15) Various combinations of _______________________ at each of several genes control human skin color.
A
alleles
B
chromosomes
C
DNA
D
traits
*select an answer for all questions
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