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Genetics Test Review
Test Description: Review of key terms and processes you should understand from out Genetics Unit.
Instructions: Answer all questions to get your test result.
1) A student wants to cross parent mice to produce offspring with black fur and offspring with white fur. If black fur color (B) is dominant to white fur (b), what should be the genotypes of the parent mice?
A
bb and bb
B
Bb and Bb
C
BB and BB
D
BB and Bb
2) Two heterozygous tall plants (Tt) are crossed. What are the expected genotypes and percentages of this cross?
A
Tt 25%; TT 50%; 25%
B
TT 25%; tt 75%
C
TT 25%; Tt 50%; tt 25%
D
TT 50%; Tt 50%
3) In guinea pigs, the allele for rough coat (R) is dominant to the allele for smooth coat (r). A heterozygous guinea pig is crossed with a homozygous recessive guinea pig. What percentage of offspring will be homozygous recessive?
A
25%
B
0%
C
50%
D
100%
4) What percentage of offspring from a cross between a homozygous Type A parent with a heterozygous Type A parent is expected to contain the i allele?
A
75%
B
50%
C
100%
D
25%
5) In a certain species of rabbits, black coat color is dominant over brown coat color. What is the probability of producing a rabbit with brown coat color from two rabbits that are both heterozygous with black coat color?
A
0%
B
25%
C
100%
D
75%
6) A method of quickly producing genetically identical plants and animals is
A
genetic engineering
B
cloning
C
embryo transfer
D
selective breeding
7) Genes code for specifically structured
A
lipids
B
proteins
C
sugars
D
acids
8) Which DNA structure provides a set of instructions for a cell to make specific proteins?
A
gene
B
ribosome
C
cell
D
nucleus
9) What types of cells are found only in organisms that reproduce sexually?
A
skin cells
B
prokaryotic cells
C
gametes
D
blood cells
10) Why does sexual reproduction result in more genetic diversity than asexual reproduction?
A
Reproduction occurs quickly
B
More organisms reproduce this way
C
Traits from two parents are combined
D
Offspring come from identical parents
11) Which of these is accomplished by the interaction of haploid cells in sexually reproducing organisms?
A
production of offspring with identical chromosomal combinations from both parents
B
deletion of genetic material that has mutated
C
elimination of genes that selection pressures are acting against
D
production of a zygote with a complete set of chromosomes with genetic material from two parents
12) Which genetic mutation can be passed to the offspring?
A
A gamete containing an extra chromosome is formed.
B
A cell of a reproductive organ contains a damaged chromosome.
C
Excessive sun exposure causes uncontrolled mitosis in skin cells
D
The DNA of a lung cell is damaged by exposure to cigarette smoke
*select an answer for all questions
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