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HSA Biology – “Be the Change”
Scientist Points – 1 2 3 4 5 6 7 8 9 10
Name: _________________________________________ Date: ________________ Period: ___________
Unit 5 Heredity Review Day
Objective:
D.N.A
1. What is a karyotype?
2. What is the sex of this individual? ____________
3. What genetic disorder does this individual have? ____________
4. How do you know?
5. What caused this individual to develop this genetic disorder?
Unit 5 Heredity Unit Review Packet
1. Complete the table below (3.5 pts)
Characteristic
Examples
Asexual Reproduction
Bacteria-Binary Fission
Sexual Reproduction
Some plants – Vegetation
propagation
Yeast - Budding
Number of parents
Offspring (Genetically
identical/Different)
Where does the DNA come
from?
For questions 2-4, CIRCLE the answer that best completes the sentences below (.5 pt each).
2.
Human skin cells are (HAPLOID / DIPLOID)
a. Human skin cells contain (23 / 46) chromosomes
b. Human skin cells are (BODY / GAMETE) cells
3. Human egg and sperm cells are ( HAPLOID / DIPLOID)
a. Human egg and sperm cells contain (23 / 46) chromosomes
b. Human egg and sperm cells are (BODY / GAMETE) cells
4. After the sperm fertilizes the egg, the resulting zygote has (23 / 46) chromosomes.
For questions 5-6, use the steps to calculate the chromosomal number and show your work! (2 pts each)
5. A grasshopper has 180 chromosomes in its wing cells. How many chromosomes can be found in its
gametes?
6. After an egg cell containing 16 chromosomes is fertilized, how many chromosomes will be present in
the zygote?
7. Complete the table below (6 pts)
Occurs in
Which Type
of Cells?
Number of
Divisions
How Many
Daughter
Cells Are
Made?
Daughter
cells
Genetically
Identical or
Different
from Parent
Cell?
MITOSIS
MEIOSIS
For questions 8 and 9, choose the multiple choice answer (1 pt each)
8. What is the purpose of “crossing over” during Prophase I?
9. Which of these does not occur during meiosis?
a. Production of identical gametes
b. Production of new gene combinations
Chromosome
Reason for
Number (same Occurrence
or half of
in Body.
parent cell)
c. Crossing-over of homologous chromosomes
d. Reduction of chromosome number by one-half
10. (.5 points each)
a. Cell 1 is called a ___________
b. Cell 2 is called a ___________
c. Both Cell 1 and Cell 2 are in a class of special cells called _________
d. Both Cell 1 and Cell 2 were made by a special cell division process called ______________
e. Explain the genetic purpose of that special division process that made Cell 1 and Cell 2
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
f. Process A is called ________________________
g. Cell 3 is called a __________________
h. Compare the number of chromosomes in Cell 3 to the number of chromosomes in Cell 1 and 2
____________________________________________________________________________
i. Process B that made many cells from one cell is called _____________________
Unit 4 BCR – Meiosis and Mitosis (5 pts)
11. You have learned about genetic information and how it is passed from one cell to another during the
process of cell division. Contrast the processes and products of mitosis and meiosis. Make sure you
describe the end product of each type of cell division and explain why it is important to an organism.
__________________________________________________________________________________________
__________________________________________________________________________________________
__________________________________________________________________________________________
__________________________________________________________________________________________
__________________________________________________________________________________________
__________________________________________________________________________________________
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Human Chromosomes
12. Use the karyotype below to answer the questions below (.5 pt each)
a. How many chromosomes can be found in a normal human karyotype?___________________
b. How many chromosomes are present in the karyotype picture above? ____________________
c. On which chromosome pair do you find an “extra” chromosome? _________________
d. What is the sex of the person in this karyotype? __________________
e. What genetic disorder is displayed in the karyotype? ____________________
f. The displayed genetic disorder is caused by a chromosomal mutation caused nondisjunction.
What is nondisjunction? ________________________________________________________