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Reproduction in Gymnosperms

Diploid egg c...

Question

Diploid egg can directly develop into embryo without fertilisation commonly in all the following plants except

A

Rubus

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B

Poa

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C

Citrus

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D

Apple

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Solution

The correct option is C Citrus
Formation of embryo directly from diploid egg without fertilisation is called diploid parthenogenesis. It can be observed in Rubus, Apple, Poa.

Two or more embryos arising in the same embryo sac commonly from nucellus is observed in Citrus. It gives rise to a condition called polyembryony.

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In bees parthenogenetic zygote develops into monoploid male

(2)

The fertilised egg develops into diploid female.

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Reproduction in Gymnosperms

Standard XII Biology

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