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Genetics Chapter 5
Test Description: 7th grade
Instructions: Answer all questions to get your test result.
1) In a human body cell there are 46 chromosomes. How many chromosomes are in a sperm??
A
92
B
23
C
random number
D
46
2) If the genotype is Bb and B= brown eyes and b= blue eyes, what is the phenotype?
A
green eyes
B
blue eyes
C
homozygous
D
brown eyes
3) Which is an example of a homozygous recessive genotype?
A
rr
B
Rr
C
RR
D
RrRr
4) Which sex chromosomes do male have?
A
dominate
B
XX
C
recessive
D
XY
5) Which of the following is the smallest pieces that makes up the other terms?
A
genes
B
chromosomes
C
nucleus
D
cells
6) If you cross two rabbits that have the genotype Bb, how many possible genotypes are there?
A
2
B
1
C
4
D
3
7) If you cross two rabbits with the genotype Bb, What is the percent chance that they will we homozygous recessive?
A
75%
B
100%
C
25%
D
50%
8) What is the study of inheritance?
A
ecology
B
cytology
C
genetics
D
dominance
9) Who is considered the father of genetics and studied pea plant charateristics?
A
Robert Hooke
B
Gregor Mendel
C
Charles Darwin
D
Mr. Meyer
10) Which is an example of a heterozyous genotype?
A
brown hair
B
hh
C
Hh
D
HH
*select an answer for all questions
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