Download Genetics Test Review

Genetics Test Review.
NAME_________________________PER_______
1. Name two scientists and role in the discovery of DNA.
Draw a short sequence of DNA. Be sure to include- nitrogen base, sugar, phosphate, Adenine, Thymine,
Guanine, and Cytosine.
2. How is DNA replicated?
______________________________________________________________________________
______________________________________________________________________________________
______________________________________________________________________
What part of the cell cycle does this occur in?______________________
How many copies of DNA are made?______ Are they exactly the same?____________
3. What is a mutation?____________________________________________________________ _____
4. What are two similarities between mitosis and meiosis?
_________________________________________________________________________
Fill in 4 differences
MITOSIS
1. type of cell
____________
2. # of cells produced
____________
3. chromosome #
____________
4. genetic makeup
____________
5. What are the three types of RNA and what are they used for?
MEIOSIS
___________
____________
____________
_____________
6. List and Describe the two steps of Protein Synthesis?
7. What are the monomers of a protein called?
8. What is the difference between homozygous and
heterozygous?____________________________________________________
Mark Ho or He AB_____
aa______ AA_____ Zz______ ff_____
TU___ TT____
9. What is the difference between genotype and
phenotype?________________________________________________________
10. Define dominant and recessive. Give an example of each. _________________________________
______________________________________________________________________________
11. Mark a “ph” for phenotype, and “gen” for genotype.
Brown hair_____
Aa_____
green eyes_____
light blue skin____ AB_____ ii_____
nose____
Zz______ aA___ BbCCDdEe____ tall______
cleft chin_____ widow’s peak____
Ss_____
long
12. Billy Bob Bankston is homozygous for curly hair and marries Hollee Jo who is heterozygous for curly hair. Curly
hair is a dominant trait.
What are their genotypes? Billy Bob _____ Hollee Jo______
Billy Bob and Hollee Jo and planning to have children. Make a Punnett Square to show their possible offspring.
What are the possible genotypes? __________________________
What are the possible phenotypes?__________________________
What percentage of the offspring will have curly hair?_________Straight hair?_________
13. Yuppie Smith and Snobby Sue are planning to have a baby. The need to be sure they have a good chance of
having a child with long, luxurious eyelashes. They want their children to all become models, so they can sit back
and enjoy a leisure life. Long eyelashes is a recessive trait(n=long eyelashes, N=normal eyelashes). Snobby Sue is
homozygous for long eyelashes, while Yuppie is heterozygous.
What are their genotypes? Yuppie______ Snobby Sue______
Make a Punnett Square to determine their chance of having children with long, luxurious eyelashes.
What are the possible genotypes for the children?___________________________
What are the possible phenotypes?_______________________________________
What percentage of their offspring will have long eyelashes?_________ Normal eyelashes?_______
If you were the Smith’s, would you have a good chance of never working again? Why or why not?_
Patterns of Inheritance ( Ch.11-2)
14. Define the following patterns of Inheritance and give an example of each.
Incomplete Dominance
Sex-Linked
Multiple Alleles
Polygenic Traits
Codominance
Epistasis
Problem #1 In pea plants, yellow peas are dominant over green peas.
Use a Punnett square to predict the phenotypic and genotypic outcome (offspring) of a cross between a plant
heterozygous/hybrid for yellow (Yy) peas and a plant homozygous/purebred for green (yy) peas.
Problem #2 - In pea plants, yellow peas are dominant over green peas.
Use a Punnett square to predict the phenotypic and genotypic outcome (offspring) of a cross between two
plants heterozygous for yellow peas.
Problem #3 - In pea plants, round peas are dominant over wrinkled peas.
Use a Punnett square to predict the phenotypic and genotypic outcome (offspring) of a cross between a plant
homozygous for round peas (RR) and a plant homozygous for wrinkled peas (rr).
Problem #4 - In pea plants, round peas are dominant over wrinkled peas.
Use a Punnett square to predict the phenotypic and genotypic outcome (offspring) of a cross between two
plants heterozygous for round peas.
Problem #5- In humans, the genes for colorblindness and hemophilia are both located on the X chromosome
with no corresponding gene on the Y. These are both recessive alleles. If a man and a woman, both with normal
vision, marry and have a colorblind son, draw the Punnett square that illustrates this.
If the man dies and the woman remarries to a colorblind man, draw a Punnett square showing the type(s) of
children could be expected from her second marriage. How many/what percentage of each could be expected?