Name: _____________________________________
Review Meiosis
1. Compare/contrast mitosis and meiosis.
2. A body cell contains 8 chromosomes and undergoes mitosis.
a. How many chromosomes does each daughter cell contain?
b. Do the daughter cells contain homologous pairs?
3. What is the purpose of meiosis?
4. a. Where does meiosis occur in a male? ________________
b. What are the gametes called that a male produces?
5. a. Where does meiosis occur in a female?
b. What are the gametes called that a female produces?
6. A stomach cell of a lizard has 16 chromosomes.
a. What is the total number of chromosomes normally present in a sperm cell of this lizard?
b. Are the chromosomes found in the sperm cell diploid or haploid?
7. Why is it important that a sex cell contain ½ the DNA of the organism?
8. Briefly explain Meiosis I and II.
9. What is crossing over? When does it occur? Does it increase or decrease genetic variation?
10. Be able to read a karyotype.
a. Determine if there is a missing or extra chromosome
b. Determine the sex of the individual
c. Identify the autosomes and the sex chromosomes
d. How many chromosomes are in a normal human karyotype?
e. What strategies did you use to help match up pairs of chromosomes?
11. Explain nondisjunction and how it can produce a gamete with an extra or missing chromosome.
12. An individual has the following sex chromosome, X.
a. This is considered a trisomy or monosomy? Why?
b. This individual has which chromosomal disorder? Klinefelter’s syndrome or Turner’s
syndrome?
13. An individual has the following sex chromosomes, XXY.
a. This is considered a trisomy or monosomy? Why?
b. This individual has which chromosomal disorder? Klinefelter’s syndrome or Turner’s
syndrome?
14. a. An extra 21 chromosome causes _______________________________.
b. This individual has a total of _______________ chromosomes.
15. a. How many chromosomes does a zygote contain?
b. Are the chromosomes diploid or haploid?
c. Explain your answer to b.
16. The sex chromosomes found in a normal female are ______________
17. The sex chromosomes found in a normal male are ________________
18. Vocab: homologous chromosomes, diploid, haploid, gonads, gametes, autosomes, karyotype,
zygote, crossing over, nondisjunction,