Genetics test review
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7th Grade
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20 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What fraction of individuals will be homozygous dominant?
1/3
1/2
2/3
1/4
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Freckles are dominant over not having freckles. If the following cross occurred, Ff x Ff, what percentage of the offspring would you expect to NOT have freckles?
100%
75%
50%
25%
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Two identical alleles for a trait is known as
homozygous
heterozygous
mutation
codominance
4.
FILL IN THE BLANKS QUESTION
1 min • 1 pt
What are an individual's traits determined by?
(a)
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In rabbits, black fur (B) is dominant over brown fur (b). If a rabbit has brown fur, what can you conclude about its genotype?
6.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
What is the definition of phenotype?
The physical expression of a trait
The genetic combination of alleles
A gene on the DNA strand
A variation of a gene
7.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
How many offspring will show the recessive trait?
0%
25%
50%
75%
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