Explanation:
The correct sequence of sperm formation is:
Spermatogonia → Spermatocyte → Spermatid → Spermatozoa.
So, the correct answer is 'Option D- Spermatogonia, Spermatocyte, Spermatids, Spermatozoa'.
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$bb =$ for brown colour alleles
Offspring of a cross between a black mouse and brown mouse allowed to interbreed than find out the percentage of black coat in them
$I.$ Eco. $RI$ restriction endonuclease enzyme is isolated from Escherichia coli $RY13$
$II.$ Its recognition sequence is $5^{\prime}-$ $GAATTC - 3 '$
$3^{\prime}-C T T A A G-5^{\prime}$
$5^{\prime}-G-A-A-T-T-C-3^{\prime}$
$3^{\prime}-C-T-T-A-A-G-5^{\prime}$
$III.$ Its site of cleavage is