Name:
ANT 3514 – Introduction to Biological Anthropology
Mendelian Genetics
Lab 5, Week of 2/2/04
This lab is designed to give you a basic background in genetics. These questions are to be
completed primarily at home. However, your lab section will provide you with information and
examples that will assist you. Reading over Ch. 2 is highly encouraged.
Question 1:
Name the three chemical components that make up DNA?
Question 2:
What two steps are involved in the formation of a protein?
Question 3:
Having one’s earlobe attached is a recessive trait (e), while a free earlobe is dominant
(E). The ability to roll your tongue is a dominant trait (T), while an inability to do this is
recessive (t). Construct a punnett square for a mating between individuals with
genotypes:
Female = Ee tt
Male: Ee Tt
Female
Et
Male
ET
Write out each genotype (ex. EE TT) and the ratio of offspring possessing each. Then
write out each phenotype (ex. Attached earlobe & tongue roller) and the ratio of
individuals having each.
Question 4:
Two black mice were mated over several years and produced 29 black and 9 white
offspring. Explain these results by giving the genotypes of the parents and offspring.
Question 5:
What is ‘phenotype’ and how is it determined?
Question 6:
Prize breeding cattle are black and tan. Farmer Bob purchased a superb black and tan
bull for $250,000. The progeny sired by this bull were all normal in appearance.
However, when these progeny were interbred white-speckled calves were produced at a
frequency of 25%. Why did the farmer remove this bull from his breeding population
and ask for his money back?
Question 7:
Name and describe Mendel’s two principles which were discussed in lab and lecture.
Question 8:
This diagram is a pedigree showing phenotype in three breeding generations. The
notation in the 3rd generation denotes the number of offspring produced that have the
phenotype shown. In the adjacent box fill in the genotype for reach individual based on
their phenotype and the phenotype of their relatives (e.g., AA). Make sure you take
dominance into account. Use: A=Dominant & a=Recessive
st
1 Generation
1
☻x☻
Genotypes for Individuals
2
↓
3
2nd
☻ ☻☻ ☻
4
5
X
3rd
X
6
X
☻☻☺ ☻
ALL
¼
¾
7
8
ALL
9
10
1._____
2._____
3._____
4._____
5._____
6._____
7._____
8._____
9._____
10._____
PLEASE USE COMPLETE SENTENCES
1. A Gene for Nothing (p23 of your reader)
Does Diamond believe that the biological and environmental components which make up
behavior should be placed into separate categories? Explain.
2. Blood, Genes, and Malaria (p. 29 in your reader)
Explain what the malaria-protection hypothesis is.
Name 2 other antimalarials and the regions of the world from which they originate.