Question

1. Why can a 46, XY individual with an androgen receptor (AR) deletion develop female sex characteristics even when testosterone levels are high?

   	a.	The SRY gene is absent
   	b.	Cells no longer respond to testosterone
   	c.	A Barr body is present
   	d.	Both b and c

1 points   

QUESTION 12

1. PCR analysis of athletes was used to determine:

   		The level of testosterone
   		Athletic performance
   		The presence of the SRY gene
   		Androgen insensitivity

1 points   

QUESTION 13

1. On which chromosome is the SRY gene, the sex determining region, located on?

   		X chromosome
   		Chromosome 22
   		Y chromosome
   		Allosomes

1 points   

QUESTION 14

1. A Barr body would be most likely be present in an individual with which of the following genetic variations?

   		46, XY with a CYP21A2 mutation
   		47, XXY
   		45, X
   		46, XY with an SRY gene mutation

1 points   

QUESTION 15

1. Although there is a range of values, female athletes typically have a testosterone concentration that is ___ that of male athletes.

   		1/2
   		1/10
   		1/100
   		Roughly equal to

1 points   

QUESTION 16

1. In 2018 the testosterone rules were changed and currently ___

   		are disputed by some scientists.
   		are being applied to track events.
   		are applied to androgen-sensitive individuals.
   		all of the above

1 points   

QUESTION 17

1. In the female embryo, the ovaries produce ___, which signal the ___ to develop into female reproductive structures.

   		testosterone; Wolffian ducts
   		testosterone; Mullerian ducts
   		estrogens; Wolffian ducts
   		estrogens; Mullerian ducts

1 points   

QUESTION 18

1. Which of these athletes exhibits only typical biological female traits?

   Athlete	Barr body	SRY gene	Testosterone
   A	Yes	Yes	High
   B	No	No	Low
   C	No	Yes	High
   D	Yes	No	Low

   		Athlete A
   		Athlete B
   		Athlete C
   		Athlete D

1 points   

QUESTION 19

1. Which of the following is NOT a part of a neuron?

   		Axon
   		Ganglion
   		Cell Body
   		Dendrite

1 points   

QUESTION 20

1. A membrane potential is the difference in electrical charge between:

   		potassium and sodium ions
   		the inside and outside of the cell
   		phosphoric acid and glycolipid layers
   		resting and action potentials

Answer 1

Ans:b)Cells no longer respond to testosterone

explaination :Androgen receptor is the site where testosterone binds and perform function that is male secondary sexual chracters so   individual with an androgen receptor (AR) deletion develop female sex characteristics even when testosterone levels are high because it become insensitive to testosterone.

ans-12)The presence of the SRY gene

explaination:In  pcr assay gene or DNA detection occur.

Ans-13)Y chromosome

SRY gene is present on Y chromosome

Ans-14)47, XXY

no of barr body =(no of X chromosome -1)

here no of barr body is =2_1=1