Cleavage is:
1. | Dissolution of the zona pellucida |
2. | A specialized mitotic division in the late fetus |
3. | A specialized meiotic division in the late fetus |
4. | A specialized mitotic division in the zygote and early embryo |
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Morula is a solid ball of cells during early embryonic development and consists of:
1. | 4 – 8 cells | 2. | 8 – 16 cells |
3. | 24 – 30 cells | 4. | 60 – 72 cells |
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The trophoblast cells of the blastocyst form:
1. | Embryo | 2. | Umbilical cord |
3. | Placenta | 4. | Teratoma |
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Implantation in humans occurs at the stage of:
1. | Zygote | 2. | Morula |
3. | Blastocyst | 4. | Gastrula |
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During pregnancy, the levels of thyroxin:
1. Increase several folds in maternal blood
2. Increases several folds in fetal blood
3. Decreases several folds in maternal blood
4. Decreases several folds in fetal blood
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The fetus develops limbs by the end of:
1. One month of pregnancy
2. Two months of pregnancy
3. First trimester of pregnancy
4. Second trimester of pregnancy
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The correct sequence of development of embryonic stages in humans is:
1. | Zygote → Blastula → Blastocyst |
2. | Zygote → Gastrula → Blastula |
3. | Zygote → Blastocyst → Gastrula |
4. | Zygote → Gastrula → Blastocyst |
The first movements of the fetus and the appearance of hair on the head are usually observed during:
1. | 2nd month | 2. | 3rd month |
3. | 5th month | 4. | 6th month |
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Which of the following is not produced in the woman only during pregnancy?
1. | hCG | 2. | hPL |
3. | Relaxin | 4. | Oxytocin |
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In human beings, the embryo heart is formed about after ________ of pregnancy.
1. | One month | 2. | Two months |
3. | First trimester | 4. | Second trimester |
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