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ADV 7th Benchmark Review 2-a
Test Description: Questions related to our heredity units
Instructions: Answer all questions to get your test result.
1) What is the matching DNA strand to the following DNA sequence? TAGGACT
A
ATCCACT
B
GCTACTA
C
ATCCTGA
D
TAGGACT
2) During sexual reproduction genetic material combines from
A
one person
B
two offspring
C
one parent
D
two parents
3) Many characteristics are affected by the interactions between genes and _____
A
alleles
B
carriers
C
the environment
D
chromosomes
4) A mutation in the DNA is harmful to an organism if it
A
changes the DNA of the organism
B
increases the organism's chances for survival and reproduction
C
reduces the organism's chances for survival and reproduction
D
changes the genotype of the organism
5) Chromosomes are made up of
A
many traits
B
many genes joined together
C
one pair of alleles
D
transfer RNA
6) The process by which the number of chromosomes is reduced in half to form sperm and eggs is called
A
mitosis
B
alleles
C
genotype
D
meiosis
7) During sexual reproduction, the sperm and egg each contribute
A
two times he number of chromosomes in body cells
B
forty six chromosomes
C
one quarter of the number of chromosomes in body cells
D
half the number of chromosomes in body cells
8) In a cross between a homozygous recessive (white) rabbit and a heterozygous organism (black), what is the probability that the offspring will have white hair?
A
4 in 4
B
1 in 4
C
3 in 4
D
2 in 4
9) Black hair is a dominant trait; White hair is recessive. What is the phenotype of an offspring that is ww?
A
gray hair
B
it is impossible to determine
C
white hair
D
black hair
10) An organism with two identical alleles for a trait is
A
homozygous
B
recessive
C
dominant
D
heterozygous
*select an answer for all questions
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