- 1(current)
Q. No.The mechanism of sex determination in grasshoppers is:
| 1. | XX – XY; male heterogamety |
| 2. | XX – XY; female heterogamety |
| 3. | XX – XO; male heterogamety |
| 4. | XX – XO; female heterogamety |
Subtopic: Sex Determination | Sex Determination: Further Considerations |
88%
From NCERT
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During his observation of spermatogenesis in a few insects, Henking found that a nuclear structure was received by 50 % of the sperms. He called this structure as:
| 1. | X – body | 2. | Y–body |
| 3. | X – chromosome | 4. | Y – chromosome |
Subtopic: Sex Determination | Sex Determination: Further Considerations |
81%
From NCERT
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In humans, the mechanism of sex determination is:
| 1. | XX – XY; male heterogamety |
| 2. | XX – XY; female heterogamety |
| 3. | XX – XO; male heterogamety |
| 4. | XX – XO; female heterogamety |
Subtopic: Sex Determination | Sex Determination: Further Considerations |
95%
From NCERT
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In birds, the mechanism of sex determination is:
| 1. | XX – XY; male heterogamety |
| 2. | ZZ – ZW; female heterogamety |
| 3. | XX – XO; male heterogamety |
| 4. | ZZ – ZW; male heterogamety |
Subtopic: Sex Determination | Sex Determination: Further Considerations |
69%
From NCERT
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A couple has a daughter. What is the probability that their next child will be a daughter?
| 1. | 0 % | 2. | 25 % |
| 3. | 50 % | 4. | 100 % |
Subtopic: Sex Determination | Sex Determination: Further Considerations |
91%
From NCERT
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It is unfortunate that in our society women are blamed for producing female children and have been ostracised and ill-treated because:
| 1. | The sex is determined by the type of sperm fertilizing the egg |
| 2. | The sex is determined by the type of egg fertilizing the sperm |
| 3. | The sex is determined by the hormones produced by the fetus |
| 4. | The sex is determined by God’s Will |
Subtopic: Sex Determination | Sex Determination: Further Considerations |
89%
From NCERT
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The source of any of the genes located on either of the X chromosomes in a female cannot be:
| 1. | Her Mother's Father. | 2. | Her Father's Mother. |
| 3. | Her Mother's Mother. | 4. | Her Father's Father. |
Subtopic: Sex Determination: Further Considerations |
71%
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Subtopic: Sex Determination | Sex Determination: Further Considerations |
89%
From NCERT
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- 1(current)
Q. No.
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