wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

(a) About 300 million spermatozoa may be present in a human male ejaculation at one time. Calculate how many spermatocytes will be involved to produce this number of spermatozoa.
(b) How many spermatids will be formed?
(c) How many chromatids are found during oogenesis in primary oocyte and first polar body in a human female? [1+1+1]

Open in App
Solution

(a) One spermatocyte produces four spermatozoa. The number of spermatocytes to produce 300 million spermatozoa = 300/4 = 75 million. [1]

(b) One spermatozoa is formed from one spermatid. 300 million spermatids will be formed. [1]

(c) 46 chromatids (2n) and 23 (n) chromatids are found in primary oocyte and first polar body respectively. This is because first polar body is formed after the first meiotic division.[1]

flag
Suggest Corrections
thumbs-up
14
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Oogenesis
BIOLOGY
Watch in App
Join BYJU'S Learning Program
CrossIcon