Hanary Alex

1.A woman with normal blood clotting mates with a man who has hemophilia. Their first child is a boy who has hemophilia. Tests show that the father and son both have the same form of hemophilia, that it is X-linked recessive, and that the boy has normal genetic inheritance. You can predict that if the couple produces more children together, then the odds are that

a. half of the boys and half of the girls will have hemophilia.

b. none of the rest of the children should have hemophilia.

c. half of the boys and none of the girls will have hemophilia.

d. all of the children will have hemophilia.

2.Which of the following does NOT contribute to genetic variation?

a. DNA reorganization during interkinesis.

b. Random fertilization of gametes in sexual reproduction.

c. Recombination between non-sister chromatids.

d. Random segregation of chromosomes in Meiosis I.

e. Independent assortment of alleles in Meiosis II.

3. Which of the following is NOT true regarding dominance/recessiveness relationships of alleles?

a. These relationships arise from the physical interaction of a dominant allele sequence blocking a recessive allele from being expressed.

b. Dominant alleles are not necessarily more common in a population than recessive alleles.

c. They range from complete dominance through various degrees of incomplete dominance to codominance.

d. They indicate the mechanisms by which specific alleles are expressed in the phenotype.

1. Joe and Sue are carriers of the recessive condition albinism (each have genotype Aa). They have one child, and a second child two years later. The probability of the second child having genotype aa is ______ of the first child having genotype aa.

a. dependent

b. independent

When Mendel crossed yellow-seeded and green-seeded pea plants, all the offspring were yellow seeded. When he took these F1 yellow-seeded plants and crossed them to green-seeded plants, what genotypic ratio is expected?

a. 9:3:3:1

b. 3:1

c. 1:2:1

d. 1:1

Hemophilia is caused by several genetic factors; one, a recessive allele of an X-linked gene, is the subject of this problem. Assume that a man with hemophilia marries a normal woman whose father had hemophilia. What is the probability that they will have a daughter with hemophilia?

a. 1/2

b. 1/4

c. 1/16

d. 1/8

e. 3/4

Just considering the distribution of maternal and paternal chromosomes, how many different gametes could 1 individual fruit fly (2n=8) create?

a. 128

b. 256

c. 32

d. 4

e. 16

f. 8

a. 1/4

b. 2/3

c. 1/8

d. 1/2

Assume an individual is of genotype MmNn, with the genes on different chromosomes. The principle of segregation suggests that this individual's gametes (resulting from meiosis) will contain

a.either Mm OR Nn.

b.only MN and mn.

c.[M or m], AND [N or n].

d.either [M or m], OR [N or n], but not both.

help!!!

a. cannot be determined from this information

b. is A

c. is B

d. is AB

e. could be A or B

f. is O

a muscle fiber contracts by 3.5 cm and in doing so lifts a weight. Calculate the work performed by the fiber.Assume the muscle fiber obeys hooke's law F= -k x with a force constant k of 750. N m^-1

Approximately how many oxygen molecules arrive each second at the mitochondrion of an active person with a mass of 84 kg? The following data are available: Oxygen consumption is about 40. mL of O2 per minute per kilogram of body weight, measured at T = 300. K and P= 1.00 atm. In an adult there are about 1.6 x10 ^10 cells per kg body mass. Each cell contains about 800. mitochondria

Provide examples of how light can damage biological molecules, in particular, information molecules (i.e., RNA and DNA), directly and indirectly.

explain

i got this letter in the mail saying, since you last attended high school, your educational history indicates time periods when you were not enrolled in any further academic coursework. Please submit a list, with dates, of your activities while not enrolled in courses. If you have inadvertently forgotten to indicate your enrolment in coursework since you left high school, also submit the names and dates of all institutions attended.

i graduated from high school last year and i go to night school to upgrade my marks, so far i am done my first semester of night school at bramelea secondary school and i sent my transcript which i received after showing my guidance my final mark and gave my a transcript which they received by courier and i am going start second semester night school for calculus and vectors on the second week of February, but i just want to know what do have to send regarding this letter and what is the procedure of sending it. Do i just type up the night school i have been to and send it to them or something plzzzz help i am stressing