Download Ch 10 Genetics ~ Study Guide Name

Ch 10 Genetics ~ Study Guide
Ch 10 ~ Mendel & Meiosis
Name ___________________________
Period _______ Date ______________
p. 252 - 279
1. Who was the scientist who experimented with pea plants to determine how traits are
passed down from one generation to the next? _________________________
2. What do we draw to predict the possible offspring of crosses between different
genotypes? ______________________________
3. How many pairs of chromosomes do humans have? __________
4. The 23rd pair of chromosomes differ in males and females. What do we call this
pair? _____________________
5. What genotype is male? _______ What genotype is female? ______
6. Any time parents reproduce, what is the chance
that the child will be a girl? __________
7. Draw a Punnett Square to determine probability
X
Y
X
X
8. What is a gene? __________________________________________________
9. Genes located on homologous chromosomes may have alternate forms that control
different forms of a trait. What are these alternate forms of a gene are called?
__________________________________
10. Cells containing one allele for each trait are called ____________cells
11. Cells containing two alleles for each trait are called _____________ cells.
12. What are gametes? ________________________________________________
13. Define heterozygous _______________________________________________
14. Define homozygous ________________________________________________
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15. Define genotype _________________________________________________
16. Define phenotype ________________________________________________
17. For a recessive trait to show up or be expressed, how many recessive alleles does an
organism need for that trait? ____
18. A male black Labrador retriever is heterozygous dominant for fur color with yellow
fur being recessive.
What is the above dog’s genotype? __________ phenotype? _______________
19. If this male mates with a female homozygous
yellow lab, what is the probability of having
yellow lab puppies? ________%
What is the ratio of black to yellow?
___ black: ___ yellow or __ : __
B
b
b
b
Draw a Punnett Square to determine probability
20. What if he mates with another black
heterozygous female…now what is the
probability of having yellow furred pups?
_________%
Draw a Punnett Square to determine probability
21. Cells that produce body cells undergo a form of cell division called ____________.
22. Cells that produce gametes undergo a form of cell division called ______________.
23. At the end of this process, diploid cells become _________________ cells.
24. They now have ___________ the number of chromosomes as the diploid cells.
25. What is Meiosis? _______________________________________________
_________________________________________________________________
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_________________________________________________________________
26. How does it differ from mitosis? ______________________________________
__________________________________________________________________
__________________________________________________________________
27. What does “crossing over” result in? __________________________________
__________________________________________________________________
28. What is non-disjunction? ___________________________________________
_________________________________________________________________
__________________________________________________________________
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