Download Lab9_Genetics - Jocha

STUDY GUIDE
Mt. SAC Biology 1
LAB 9: Genetics
1. Read the introduction and the answers you gave in your exercise and explain what the difference is between…
Diploid (2N)
Genotype
Homozygous
Dominant (alleles)
vs. Haploid (N)
vs. Phenotype
vs. Heterozygous
vs. Recessive (alleles)
2. Imagine, you have two cells undergoing cell division, the first cell is undergoing mitosis, and the second cell is
undergoing meiosis. The first cell is going to be a somatic cell of course, while the second one will be a sex
cell. If you could “see” the contents, the inside of the cell, after both process were over, what differences would
you see between them? List ALL you can think of…
3. If a man has a genotype AO for the blood type… what will be the sex cells this person can produce regarding
the blood type?
4. If a man has genotype AO for blood type and genotype Dd for dimples, which are caused by a dominant allele
D, answer the following
a) What are the genetic traits or characteristics you are considering here?
b) What are the phenotypes for both traits?
c) What are the possible sex cells this man will produce?
5. In humans, freckles (F) on the skin show dominant/recessive behavior as indicated by Mendel, if you do not
have freckles you only have the recessive allele f. A man who has freckles marries a woman that does not have
freckles
a) Do you have enough information to determine the man’s genotype? Explain
b) Do you have enough information to determine the woman’s genotype? Explain
c) Ho does your answer change if you are told his mother did not have freckles? Explain
6. Now, answer the following questions…
a) How is incomplete dominance different from Mendel?
b) How is sex or x-linked different from Mendel?
c) How does the multiple alleles interaction differ from Mendel?
Instructor: Dr. Jose Bava