Download Mutations and Genetics Test Review

15 Week CCA
Tuesday, December 6
Mutations
Gene Mutations
1.) What is a point mutation? Give an example.
2.) Create a substitution gene mutation in the following DNA Strand, Original: TACGGT
Substitution: _________
3.) What is a frameshift mutation? Give 2 examples.
4.) Create a deletion gene mutation in the following DNA strand: Original: TACGGT
Deletion: ___________
5.) Create a insertion gene mutation in the following DNA strand: Original: TACGGT
Insertion: ___________
General Mutation Questions
6.) Can an organism pass on a mutation to its offspring? If yes, explain how this is possible.
7.) A change in a single base pair in DNA is least likely to be observed if the change occurs in
_______________________________________________________.
8. What is haploid and diploid ? If an organism’s diploid number is 40, its haploid number is_____.
Genetics
9. ) In guinea pigs, black coat color is dominant over tan coat color. Show a cross between a tan guinea pig and
a heterozygous black guinea pig. Answer the following questions below about their offspring.
F1 phenotypes: _____________________________
F1 genotype: _______________________________
F1 phenotypic percentages: ___________________
F1 genotypic percentages: ____________________
F1 phenotypic ratio: _________________________
F1 genotypic ratio: _________________________
10..) In pea plants, yellow (Y) pea color is dominant over green (y) pea color. And round (R) peas are dominant
over wrinkled (r) peas. Show a cross between a heterozygous yellow, heterozygous round pea plant with a
heterozygous yellow, heterozygous round pea plant.
11. If a person possess a gene for cancer, does that mean the person will definitely develop this type of cancer?
12.) Every cell in your body contains the same genetic information. Many of the cells in our body have a
specialized function. For example, your muscle cells are going to have a different function from your skin cells.
Explain how this is possible given your knowledge about genes.
13.) What is incomplete dominance? What is co-dominance?
14.) In northeast Kansas there is a creature know as a wildcat. It comes in three fur colors: red,
white and pink. A (rr) individual is red, a (ww) individual is white, and a (rw) individual is pink.
What would be the genotypes and phenotypes of the offspring if a red fur wildcat crossed with a
white fur wildcat?
Is this an example of incomplete dominance or codominance? ___________________
Parents’ genotype: __________________
Offspring Phenotypic ratios: _____________
15.) In northeast Kansas there is a creature know as a wildcat. It comes in three fur colors: red,
white and pink. A (rr) individual is red, a (ww) individual is white, and a (rw) individual is pink.
What would be the genotypes and phenotypes of the offspring if a pink fur wildcat crossed with a
pink fur wildcat?
Parents’ genotype: __________________
Offspring Phenotypic ratios: _____________
Sex-linked Traits
16. What is the genotype of a female________? The sex chromosome that a human female can give her
children are_______________?
17. What is the genotype of a male__________? The sex chromosome that a human male can give her
children are_______________?
18. Who determines the sex of the child? Explain why.
Single-Crosses
19. Freckles (S) are dominant over no freckles (s). Patty is homozygous dominant for freckles, while Charlie
is homozygous for no freckles. Draw a Punnett square predicting the probability if their children will
have freckles.
20. In guinea pigs, the allele for rough coat (R) is dominant to the allele for smooth coat (r). If a male guinea
pig that is heterozygous for rough coat is mated with a female with smooth coat, what are the genotypes
and phenotypes of the offspring?
Sex-linked Inheritance
21. Eye color in Drosophila is a sex-linked trait carried on the X chromosome. The gene for red eyes is
dominant over the gene for white eyes. Draw a punnett square showing the cross between a
heterozygous red eyed female with a white-eyed male.
22. Colorblindness is a sex-linked trait carried on the X chromosome. Show the cross between a colorblind
male and a normal female. What is the possibility of their children having colorblindness?
Blood Types
23. Blood type is an example of a trait that has multiple alleles resulting in more than two outcomes for
blood type. Cross a male with homozygous type A blood with a female that is heterozygous for type B
blood.
24. . Using the chart below, which blood type is the universal donor ( all blood types can receive this type of
blood)?
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25. Using the above pedigree, which type of trait is being inherited, sex-linked or dominant?
Explain why?