Lab 4

Question 1

The chimpanzee, has a diploid number of 2n=48. Identify the number of chromosomes present in each cell
a. End of mitotic telophase
b. meiotic metaphase I
c.end of meiotic anaphase II
d. early mitotic prophase
e. mitotic metaphase
f. early prophase I

Answer 1

a.48
b.48
c.24
d.48
e.48
f.48

Question 2

What process and what ploidy number of the parent organism are shown in the cell (word)

Answer 2

meiosis II 2n=4

Question 3

Identify the stage of cell division and diploid number (word).

Answer 3

metaphase of mitosis, 2n=4

Question 4

Identify the stage of celll division and the diploid number (word)

Answer 4

Metaphase I of meiosis 2n=4

Question 5

How many tetrads are there in metaphase I of meiosis in human beings

Answer 5

23

Question 6

what are homologous chromosomes made of

Answer 6

2 sister chromosomes

Question 7

What is a tetrad

Answer 7

4 chromatids

Question 8

barr body

Answer 8

inactive X chromosome

Question 9

How many chromosomes does Drosophila and how many autosome and sex

Answer 9

8 total
3 pair autosomes
1 pair sex

Question 10

How is a fly’s sex determined

Answer 10

X:A ratio

Question 11

What makes a normal female fly

Answer 11

1:1

Question 12

What makes a normal male fly

Answer 12

1:2

Question 13

what makes a metafemale fly

Answer 13

3:2 or 4:3

Question 14

what makes a intersex fly?

Answer 14

2:3

Question 15

What makes a metamale fly?

Answer 15

1:3

Question 16

incomplete dominance

Answer 16

1 allele over the other is not complete and heterozygous displays inbetween of phenotypes

Question 17

codominance

Answer 17

heterozygotes with different phenotype than either homozygote and detectable expression of both alleles like blood type

Question 18

List the blood types and genotypes

Answer 18

A:IAIA IAi
B:IBIB IBi
AB: IAIB
O:ii

Question 19

Working on barlye plants 2 researchers indepently identify a short plant mutation and develop homozygous recessive lines of short plants. How would you determine if theses 2 mutant lines carry mutation o n the same gene or different gene?

Answer 19

Cross 2 recessive mutants creates a mutant if 2 mutations are on same gene and wild type if the 2 mutations are on different genes

Question 20

Complementary Gene interaction and ratio

Answer 20

both genes present to obtain phenotype (alleles are on 2 different genes)
9:7

Question 21

How to know if complementation occurs

Answer 21

2 recessive mutatants produce same mutant phenotype will have an offspring that makes a wild type

Question 22

Non-complementation

Answer 22

mutantions are on the same gene and will produce mutant

Question 23

Xeroderma pigmentosum is and autosomal recessive condition. 10 skin cell lines were grown and fused and tested for genetic complementation. Determine what cell lines share the same mutated genes.
1-
2+ -
3 - + -
4 + + + -
5 + - + + -
6 + - + + - -
7 - + - + + + -
8+ + + - + + + -
9 + + + + + + + -
0+ - + + - - + + + -
. 123 4 56 7 8 9 0

Answer 23

Group 1: 1,3,7
Group 2: 2,5,6,0
Group 3: 4,8
Group 4: 9

Question 24

Who came up with the 1 gene- 1 enzyme hypothesis

Answer 24

George Beadle and Edward Tatum

Question 25

One gene One enzyme hypothesis

Answer 25

each gene produces and enzyme and each enzyme has a specific role in a biosynthetic pathway that produces the phenotype

Question 26

Prototroph

Answer 26

wild type

Question 27

auxotroph

Answer 27

mutant

Question 28

Adjustments to the 1 gene 1 enzyme hypothesis

Answer 28

some protein genes make transport, structural, regulatory proteins or RNA

Question 29

A-->R-->Q-->P->M . 3 2 1 4 a. What would you need to provide if enzyme 4 is nonfunctional? b. What would you ned to provide if enzyme 2 is nonfunctional? c.Can bacterium with mutated enzyme 3 grow if product Q is given d. Can mutant enzyme 1 grown if Q is given?

Answer 29

a. M b. Q c.Yes d.No