- 1(current)
Q. No.Twins are born to a family that lives next door to you. The twins are a boy and a girl. Which of the following must be true?
| 1. | The were conceived through in vitro fertilization. |
| 2. | They have 75% identical genetic content. |
| 3. | They are monozygotic twins. |
| 4. | They are fraternal twins. |
Subtopic: Â Fertilization |Â oogenesis |
 58%
Level 3: 35%-60%
NEET - 2025
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Receptors for sperm binding in mammals are present on:
| 1. | Perivitelline space | 2. | Zona pellucida |
| 3. | Corona Radiata | 4. | Vitelline membrane |
Subtopic: Â Fertilization |
 82%
Level 1: 80%+
NEET - 2021
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Meiotic division of the secondary oocyte is completed:
1. At the time of copulation
2. After zygote formation
3. At the time of fusion of a sperm with an ovum
4. Prior to ovulation
Subtopic: Â Fertilization: Part 1 |Â Fertilization |
 81%
Level 1: 80%+
NEET - 2020
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Extrusion of the second polar body from the egg nucleus occurs:
| 1. | simultaneously with the first cleavage |
| 2. | after entry of sperm but before fertilization |
| 3. | after fertilization |
| 4. | before entry of sperm into the ovum |
Subtopic: Â Fertilization: Part 1 |Â Fertilization |
 71%
Level 2: 60%+
NEET - 2019
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