Problem:

Question 1: Which of the following does NOT always occur during conjugation between an Hfr cell and another cell?

a. formation of the sex pilus

b. The recipient cell becomes parlially diploid.

c. transfer of chromosomal genes

d. transfer of DNA

e. transfer of the F factor

Question 2: Consider a mutant organism that is unable to make the amino acid arginine. Knowing that the metabolic pathway to production of arginine is ornithine --+ citrulline ---+ arginosuccinate ---+ arginine, you test the ability of the mutant to grow in the presence of each one of these compounds, providing just one of the compounds in each of your tests.

You find that the mutant can grow in the presence of arginosuccinate or arginine, but not

in the presence of citrulline or ornithine. From this you can conclude that the product of

the gene mutated in the mutant is most directly involved in producing

a. arginine from ornithine.

b. arginosuccinate from citrulline.

c. citrulline from ornithine.

d. arginine from arginosuccinate.

e. arginosuccinate from omithine.

Question 3: Your father is heterozygous for sickle cell disease. You know your mom has two "good" alleles. Which of the following is TRUE?

a.The probability that you will have the disorder is 0%, but you will have a 50% chance of having the "bad" gene.

b.It is impossible to predict the probability of the disorder for you and for your children; it depends on your gender and that of your children

c.The probability that you will have the disorder is 25% both for you and for your children.

d.The probability that you will have the disorder is 0%, and you don't need to worry about passing the "bad" allele on to your children.

e.The probability that you will have the disorder is 50% both for you and for your children.

Please suggest the right option.