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NDA · Biology
BN05 — Reproduction & Developmental Biology — Quiz
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20 Questions
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Question 1
In angiosperms, double fertilisation results in formation of:
A
Two zygotes developing into twin embryos
B
One diploid (2n) zygote and one triploid (3n) primary endosperm nucleus
C
Two haploid embryos from the two sperm nuclei
D
One diploid zygote only; the second sperm degenerates
Question 2
The zona pellucida of a mammalian egg plays a critical role in:
A
Providing nutrients to the developing embryo
B
Polyspermy block — prevents more than one sperm from fertilising the egg
C
Facilitating sperm chemotaxis toward the egg
D
Producing progesterone during early pregnancy
Question 3
During oogenesis, the primary oocyte is arrested in which stage of meiosis until ovulation?
A
Metaphase II of meiosis II
B
Prophase I of meiosis I (diplotene stage — dictyotene)
C
Metaphase I of meiosis I
D
Anaphase II of meiosis II
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