Name ____________
Genetics Reading Questions
Read pages 96-100
1. On page 97, how does the number of chromosomes in a
grasshopper’s sex cells compare to the number in its body cells?
2. On page 98, what types of cells are formed by meiosis?
3. On page 100, Figure 14, for which genes is the organism
homozygous? For which is it heterozygous?
4. The body cells of hamsters have 44 chromosomes. How many
chromosomes would be in a hamster’s sex cells?
5. Define allele.
Read pages 112-115
6. (P. 112) Name two traits that are controlled by single genes.
7. (P. 113) Why is blood type said to have multiple alleles?
8. (P. 114) Why are there so many different skin colors, hair colors,
or heights?
9. (P.114) How can environmental factors affect a person’s height?
10.
(P. 115) What are the sex chromosomes for a male? For a
female? Which parent’s chromosome determines the baby’s sex?
Read pages 119-123
11.
(P. 120) What kind of allele is that for cystic fibrosis?
12.
(P. 121) What type of allele is that for sickle cell disease?
13.
(P. 121) What type of allele is that for hemophilia?
14.
(P. 122) What causes Down syndrome?
15.
How many chromosomes would you find in the body cells of
a person with Down syndrome? Explain.
16.
(P. 122) Name 2 tools used by doctors to detect genetic
disorders.