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Direction: In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as :
Assertion : In birds, the chromosome composition of the egg determines the sex.
Reason : Female birds are heterogametic.
- a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
- b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).
- c)Assertion (A) is true but reason (R) is false.
- d)Assertion (A) is false but reason (R) is true.
Correct answer is option 'B'. Can you explain this answer?
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Direction: In the following questions a statement of assertion (A) is...
In birds, chromosomal composition of the egg determines the sex. This is called genetic sex determination, with females being heterogametic. But being heterogametic is alone not responsible for sex determination. Other factors like specific genes or autosomal, sex chromosome ratio, etc., are responsible.
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Direction: In the following questions a statement of assertion (A) is...
Assertion: In birds, the chromosome composition of the egg determines the sex.
Reason: Female birds are heterogametic.
Explanation:
The sex determination mechanism in birds is different from that in mammals. In birds, the sex chromosomes are designated as Z and W, with males having ZZ chromosomes and females having ZW chromosomes.
Chromosome composition and sex determination:
- In birds, the sex of an individual is determined by the chromosome composition of the egg at the time of fertilization.
- If a sperm carrying a Z chromosome fertilizes the egg, the resulting offspring will develop into a male bird (ZZ).
- On the other hand, if a sperm carrying a W chromosome fertilizes the egg, the resulting offspring will develop into a female bird (ZW).
Heterogametic females:
- In birds, females are considered heterogametic because they have different sex chromosomes (ZW) compared to males (ZZ).
- In other words, the female birds produce two types of eggs - one carrying a Z chromosome and the other carrying a W chromosome.
- The males, on the other hand, produce sperm carrying only Z chromosomes.
Reason as the correct explanation:
The reason that "female birds are heterogametic" is a correct explanation for the assertion that "in birds, the chromosome composition of the egg determines the sex." This is because the presence of Z and W chromosomes in females leads to the production of eggs with different chromosome compositions, which in turn determines the sex of the offspring.
Conclusion:
Based on the explanation above, it can be concluded that both the assertion and reason are true, and the reason is the correct explanation for the assertion. Therefore, the correct answer is option 'B'.
Reason: Female birds are heterogametic.
Explanation:
The sex determination mechanism in birds is different from that in mammals. In birds, the sex chromosomes are designated as Z and W, with males having ZZ chromosomes and females having ZW chromosomes.
Chromosome composition and sex determination:
- In birds, the sex of an individual is determined by the chromosome composition of the egg at the time of fertilization.
- If a sperm carrying a Z chromosome fertilizes the egg, the resulting offspring will develop into a male bird (ZZ).
- On the other hand, if a sperm carrying a W chromosome fertilizes the egg, the resulting offspring will develop into a female bird (ZW).
Heterogametic females:
- In birds, females are considered heterogametic because they have different sex chromosomes (ZW) compared to males (ZZ).
- In other words, the female birds produce two types of eggs - one carrying a Z chromosome and the other carrying a W chromosome.
- The males, on the other hand, produce sperm carrying only Z chromosomes.
Reason as the correct explanation:
The reason that "female birds are heterogametic" is a correct explanation for the assertion that "in birds, the chromosome composition of the egg determines the sex." This is because the presence of Z and W chromosomes in females leads to the production of eggs with different chromosome compositions, which in turn determines the sex of the offspring.
Conclusion:
Based on the explanation above, it can be concluded that both the assertion and reason are true, and the reason is the correct explanation for the assertion. Therefore, the correct answer is option 'B'.
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Direction: In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as :Assertion : In birds, the chromosome composition of the egg determines the sex.Reason : Female birds are heterogametic.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.Correct answer is option 'B'. Can you explain this answer?
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Direction: In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as :Assertion : In birds, the chromosome composition of the egg determines the sex.Reason : Female birds are heterogametic.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.Correct answer is option 'B'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Direction: In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as :Assertion : In birds, the chromosome composition of the egg determines the sex.Reason : Female birds are heterogametic.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Direction: In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as :Assertion : In birds, the chromosome composition of the egg determines the sex.Reason : Female birds are heterogametic.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.Correct answer is option 'B'. Can you explain this answer?.
Direction: In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as :Assertion : In birds, the chromosome composition of the egg determines the sex.Reason : Female birds are heterogametic.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.Correct answer is option 'B'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Direction: In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as :Assertion : In birds, the chromosome composition of the egg determines the sex.Reason : Female birds are heterogametic.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Direction: In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as :Assertion : In birds, the chromosome composition of the egg determines the sex.Reason : Female birds are heterogametic.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.Correct answer is option 'B'. Can you explain this answer?.
Solutions for Direction: In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as :Assertion : In birds, the chromosome composition of the egg determines the sex.Reason : Female birds are heterogametic.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.Correct answer is option 'B'. Can you explain this answer? in English & in Hindi are available as part of our courses for NEET.
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Direction: In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as :Assertion : In birds, the chromosome composition of the egg determines the sex.Reason : Female birds are heterogametic.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.Correct answer is option 'B'. Can you explain this answer?, a detailed solution for Direction: In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as :Assertion : In birds, the chromosome composition of the egg determines the sex.Reason : Female birds are heterogametic.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.Correct answer is option 'B'. Can you explain this answer? has been provided alongside types of Direction: In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as :Assertion : In birds, the chromosome composition of the egg determines the sex.Reason : Female birds are heterogametic.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.Correct answer is option 'B'. Can you explain this answer? theory, EduRev gives you an
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