QUESTION 9 A normal corpus luteum secretes large amounts of progesterone and a s

Question

QUESTION 9

A normal corpus luteum secretes large amounts of progesterone and a smaller amount of estradiol. What would result from a malfunctioning corpus luteum that secreted large amounts of estradiol and only a small amount of progesterone?

The endometrial glands would develop normally

LH levels would rise

A fertilized blastocyst would implant in the uterus

FHS levels would fall

10 points   

QUESTION 10

Mitochondria provide energy for the sperm and therefore enabling the cell to move using its flagellum. During fertilization only the head of the sperm enters the egg. What can be inferred about the fate of the sperm's mitochondria?

The mitochondria will be utilized by other sperm in order to travel faster

The sperm's mitochondria does not enter the egg, therefore the resulting offspring will have mitochondria inherited from the mother

The sperm's mitochondria enters the egg, therefore the resulting offspring will have mitochondria inherited from only the father

QUESTION 1

A species of bacteria in a your colon acquiring a complete set of antibiotic resistance genes from a completely unrelated species of bacteria is an example of –

allopolyploidy

horizontal gene transfer

stabilizng selection

pseudogene formation

10 points   

QUESTION 2

In a population of snails the individuals with the thickest shells survive and reproduce more than those with thinner shells. Assuming shell thickness is a heritable trait what should happen to the mean shell thickness in a population of snails over time

increase

decrease

remain the same

there would be no pattern

The endometrial glands would develop normally

LH levels would rise

A fertilized blastocyst would implant in the uterus

FHS levels would fall

Explanation / Answer

Question 9 - FHS levels would fall. Since increased amount of eastrdiol will lead to a condition of pre menopause. And hence the Follicular stimulating hormones levels will come down.

Question 10 - Option 2. The sperm's mitochondria does not enter the egg, therefore the resulting offspring will have mitochondria inherited from the mother. The Mitochondrial inheritance is always maternal since only mother contributes mitochondrial DNA.

Question 1 - Horizontal gene transfer. Only in this gene transfer between two different species of bacteria occurs.

Question 2 - Increase. Since the shell thickness is inheritable and the capability of it to produce more off springs will increase their size in the population.

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