Assertion: In each pregnancy there is always 50 per cent probability of either a male or a female child. Reason: The genetic makeup of the sperm determines the sex of child. a. If both assertion and reasons are true and the reason is the correct explanation of the assertion.
b. If both assertion and reason are true but reason is not the correct explanation of the assertion.
c. If assertion is true but reason is false.
d. If both assertion and reason are false.

Question

Assertion: In each pregnancy there is always 50 per cent probability of either a male or a female child.  Reason: The genetic makeup of the sperm determines the sex of child. a. If both assertion and reasons are true and the reason is the correct explanation of the assertion. 
b. If both assertion and reason are true but reason is not the correct explanation of the assertion. 
c. If assertion is true but reason is false. 
d. If both assertion and reason are false.

Filo · Accepted Answer

Step 1: The probability of having either a male or a female child in each pregnancy is 50%.

P(male)=0.5
P(female)=0.5

Step 2: The sex of the child is determined by the genetic makeup of the sperm.

Sex of Child=Genetic Makeup of Sperm

Step 3: Therefore, the probability of having a male or female child is dependent on the probability of the sperm carrying either an X or Y chromosome.

P(male)=P(sperm carrying Y chromosome)=0.5
P(female)=P(sperm carrying X chromosome)=0.5

Step 4: Since each sperm carries either an X or Y chromosome, the probability of having a male or female child is always 50%.

P(male)=P(sperm carrying Y chromosome)=Total number of spermNumber of Y-carrying sperm​=21​=0.5
P(female)=P(sperm carrying X chromosome)=Total number of spermNumber of X-carrying sperm​=21​=0.5

Question Text	Assertion: In each pregnancy there is always 50 per cent probability of either a male or a female child. Reason: The genetic makeup of the sperm determines the sex of child. a. If both assertion and reasons are true and the reason is the correct explanation of the assertion. b. If both assertion and reason are true but reason is not the correct explanation of the assertion. c. If assertion is true but reason is false. d. If both assertion and reason are false.
Topic	Inheritance
Subject	Biology
Class	Class 12
Answer Type	Text solution:1

Text solutionVerified

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