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4.Principles of Inheritance and Variation
normal
The given diagram $A$ and $B$ indicates
A
$A$-Zygotic twins; $B$-Dizygotic twins
B
$A$-Dizygotic twins; $B$-Identical twins
C
$A$-Zygotic twins; $B$-Identical twins
D
$A$-Identical twins; $B$-Dizygotic twins
Solution
$A$-Dizygotic twins are the twins, which results from the fusion of two sperm with two ova. It is very rare in case of human beings.
$B$-Monozygotic twins are the twins, which results from the fusion of one sperm with one ova leads to zygote. This zygote later on divide and give rise to two or more zygote. In this cells of all progeny have the identical genome
Standard 12
Biology
