Q. No.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 |
82%
From NCERT
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In grasshoppers, what is the chromosomal composition of a male individual?
| 1. | XX | 2. | XY |
| 3. | XO | 4. | Both XX and XY |
Subtopic: Sex Determination |
93%
From NCERT
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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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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 |
80%
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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Z Z / ZW, female heterogamety, type of sex determination is seen in:
1. Platypus
2. Snails
3. Cockroach
4. Fowl
1. Platypus
2. Snails
3. Cockroach
4. Fowl
Subtopic: Sex Determination |
87%
From NCERT
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Consider the given two statements:
| Assertion (A): | It is unfortunate that in our society women are blamed for giving birth to female children and have been ostracised and ill-treated because of this false notion. |
| Reason (R): | In each pregnancy, there is always 50 percent probability of either a male or a female child. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A). |
| 2. | Both (A) and (R) are True but (R) does not correctly explain (A). |
| 3. | (A) is True; (R) is False |
| 4. | Both (A) and (R) are False |
Subtopic: Sex Determination |
67%
From NCERT
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In fowl, the sex of offspring is determined by:
1. Male parent
2. Female parent
3. Both male and female parents
4. Environmental conditions
1. Male parent
2. Female parent
3. Both male and female parents
4. Environmental conditions
Subtopic: Sex Determination |
81%
From NCERT
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Male honeybees produce gametes by:
| 1. | Mitosis |
| 2. | Meiosis |
| 3. | Abnormal mitosis |
| 4. | Male honeybees are sterile; they do not produce gametes |
Subtopic: Sex Determination |
76%
From NCERT
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