Chapter 11 Review Guide
Part I: Textbook
pg. 283 (1-9; 14-17; 19-20). Your work must be in complete sentences for full credit!!!!
Part II: Please answer the following questions below.
(Know how to do all types of crosses studied in class, review notes and handouts)
1. Summarize Mendel’s four principles.
· Principle of Inheritance:
· Principle of dominance:
· Law of Segregation:
· Law of Independent Assortment:
2. In meiosis: Review your notes for Meiosis and read section 11.4 in your textbook.
a) What type of cells are produced by this process?
b) When does crossing over occur?
c) Describe what happens during crossing over:
d) What is the end result of meiosis I?
e) When do the sister chromatids separate in meiosis?
f) If a cell with a diploid number of 30 chromosomes undergoes meiosis, how many chromosomes will be in each gamete? ______
g) What is the SYMBOL used to show a diploid organism? ______Haploid? ______
3. Define the following terms:
multiple alleles-
polygenic traits
codominance
incomplete dominance
4. Differentiate between a gene and an allele.
5. Scenario:
Explain why horse breeders will pay a lot of money to breed one of their horses with a horse that has won the Kentucky Derby.
6. In guinea pigs, R= rough coat, and r= smooth coat. A heterozygous parent is crossed with a homozygous recessive parent. All offspring have smooth coats. Show how this is possible using a punnett square.
7. a) Give the chromosome number of a normal diploid human cell? ______
b) Haploid number? ______
c) Number of chromosomes a normal sperm should carry? ______
8. a) Synonym of homozygous (practice set #1): ______
b) Synonym of heterozygous (practice set #1): ______
9. What are linked genes? (pg. 279)
10. How does crossing over relate to genetic variety? (pg. 279)
11. What is a gene map? (pg. 280)
Do the following crosses and SHOW YOUR WORK!
12. A cross between a brown guinea pig and a white guinea pig produces offspring that are all light brown in color.
a) What pattern of heredity is being exhibited?______
b) Cross a light brown guinea pig with a brown guinea pig. List all possible genotypes and phenotypes of the offspring.
13. If yellow seeds are dominant and green seeds are recessive, cross two parents heterozygous for this trait. Give the genotypes and phenotypes of the offspring.
14. In rabbits, R=rough coats and r=smooth coats; B=brown coat color and b= white coat color. Cross two parents that are heterozygous for both traits. Give the phenotypes of the offspring (you do not need to list the genotypes).
15. A cross between a blue bird and a yellow bird produces what appears to be all green offspring. Upon closer inspection, the green offspring actually have individual blue and yellow feathers.
a) What pattern of heredity is being exhibited? ______
b) Cross a green bird with a yellow bird. Give all possible genotypes and phenotypes of the offspring.
16. In peas, the allele for tall plants is dominant over the allele for short plants. Also, purple flowers are dominant over white flowers. Cross a plant that is heterozygous tall, with white flowers, with a plant that is short, with heterozygous purple flowers. Give all phenotypes of the offspring (you do not need to list the genotypes).
17. A cross between a true breeding red flower and a true breeding white flower produces offspring that have a phenotype which is totally different from both parents. This is an example of ______.
18. A situation in which a gene has more than 2 alleles is known as ______.
19. Blood type AB is an example of ______(11-3).
20. In fruit flies, multiple genes control the trait for eye color. This is an example of ______.
21. A roan calf is born from a cross between a cow with white hair (WW) and a bull with red hair (RR). This is an example of ______.
22. Human skin color is controlled by more than 4 different genes. This is an example of ______.
23. For each genotype below, write down all possible gametes that would be produced.
1. AaBbCCDD
Possible Gametes=
2. AABBCcDD
Possible Gametes=