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Chapter 4: Patterns Of Heredity
Test Description: Review for Chapter 4 test
Instructions: Answer all questions to get your test result.
1) Inherited traits are the result of
A
the devision of 2n cells
B
practice and ability
C
genes
D
meiosis I
2) What happens during sexual reproduction?
A
A body cell from each parent combines to form a new cell.
B
A gamete from each parent combines to form a new cell.
C
Dominant genes combine to form an offspring.
D
Recessive genes combine to form an offspring.
3) An allele that is expressed even if only one copy is present in a genotype is a
A
complete allele
B
half allele
C
dominant allele
D
recessive allele
4) Dwarf pea plants (tt) are crossed with pea plants of regular height (TT). Which of these describes the first generation plants?
A
All are regular height.
B
All are dwarf height.
C
Half are regular height.
D
One-quarter are dwarf height.
5) A Punnett square is a representation of how
A
meiosis will occur
B
genes are arranged on chromosomes
C
alleles might combine
D
homologs might split
6) A parent has one dominant allele for tall (T) and one for short (t). The other parent has a tt genotype. What is the probability of the offspring's being tall?
A
0 percent
B
100 percent
C
25 percent
D
50 percent
7) What are the chances that a human offspring will have an XY genotype?
A
3:4
B
1:4
C
1:1
D
1:2
8) A 2n human cell has 46 chromosomes. How many chromosomes does a male gamete have?
A
23
B
46
C
45
D
92
9) During meiosis, cells divide
A
twice
B
eight times
C
four times
D
once
10) Which of the following occurs in meiosis that does NOT occur in mitosis?
A
Fertilization occurs.
B
Body cells are made.
C
Cell division occurs.
D
Sex cells are made.
*select an answer for all questions
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