alleryHow many chromosomes are present in (i) a human secondary spermatocyte, and (ii) a mature spermatozoon?
A(i) 46, (ii) 46
B(i) 23, (ii) 23
C(i) 46, (ii) 23
D(i) 23, (ii) 46
Answer & Solution
Correct answer: B. (i) 23, (ii) 23
Meiosis I converts the diploid primary spermatocyte (2n = 46) into two **haploid** secondary spermatocytes (n = 23).
Meiosis II then produces four haploid spermatids (n = 23) which mature into spermatozoa with **23** chromosomes each.
Keep practising Unit 8O: Population Growth & Carrying Capacity
Browse all Unit 8O: Population Growth & Carrying Capacity questions for AP Biology, or explore more Biology topics.
Related questions
Oral contraceptive pills are typically taken for how many days followed by what gap?IUDs are particularly suitable for women who wish to:Which of the following is a hormone-releasing IUD?Diaphragms, cervical caps and vaults work by:'Nirodh' is a popular brand of which contraceptive in India?Withdrawal or coitus interruptus prevents conception by:Lactational amenorrhea as a contraceptive method is effective only up to a maximum period In the periodic-abstinence method, couples avoid coitus between which days of the menstrua