Which among the following has 23 chromosomes?
  • a)
    Zygote
  • b)
    Spermatogonia
  • c)
    Secondary oocyte
  • d)
    Oogonia
Correct answer is option 'C'. Can you explain this answer?

NEET Question

By Sakshi Sharma · Sep 11, 2018 ·NEET
43 Answers
Aiims New Delhi answered Jun 01, 2018
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Yash Rathore answered Aug 30, 2018
Secondary oocyte

Sanjana Singh answered Apr 08, 2020
Zygote =46
spermatogonia=46
oogonia=46
secondary oocyte =23
so correct answer is option C

Swaranjali Karandikar answered 4 weeks ago
Diploid cell contains 46 chromosomes i.e23 pairs of chromosomes similarly haploid cell contains 23 CHROMOSOMES as sec. oocyte is haploid cell so it has 23 chromosomes.

Wahid Khan answered Dec 16, 2019
.Zygote: In humans, the male gamete is called sperm, and the female gamete is called an egg. When the gametes join they form a cell called a zygote. Human sperm and eggs contain 23 chromosomes. Human zygotes contain 46 chromosomes.

Spermatogonia: (46 chromosomes, 92 chromatids)

- Has a pair of each chromosome, and each individual chromosome has two chromatids.

- Undergoes mitosis (normal cell division) to produce a primary speratocyte.

Secondary oocyte: The secondary oocyte is the cell that is formed by meiosis I in oogenesis. Thus, it has only one of each pair of homologous chromosomes. In other words, it is haploid. However, each chromosome still has two chromatids, making a total of 46 chromatids (1N but 2C). The secondary oocyte continues the second stage of meiosis (meiosis II), and the daughter cells are one ootid and one polar body.

Secondary oocytes are the immature ovum shortly after ovulation, to fertilization, where it turns into an ootid. Thus, the time as a secondary oocyte is measured in days.

The secondary oocyte is the largest cell in the body, and in humans is just visible to the naked eye.

Oogonia: An oogonium (plural oogonia) is a small diploid cell which upon maturation forms a primordial follicle in a female fetus or the female (haploid or diploid) gametangium of certain thallophytes. Oogonia are the cells that turn into primary oocytes in oogenesis. They are diploid, i.e. containing pairs of homologous chromosomes. There are 23 chromosome pairs. Thus, there are 46 chromosomes

Amrutha Menon answered 3 weeks ago
Primary oocyte( 2n =46) undergo reduction division and forms secondary oocyte (n=23)

Sagarika Nayak answered Sep 18, 2018
Spermatogonia

Santunu Pradhan answered Apr 13, 2020
Secondary oocyte is 23 chromose . others are 2n means there are 46 chromose.so...

Sunil Jakhar answered 4 weeks ago
Bro sec oocyte hoga answer ploidy .se pta krle bro

Dileep Ravula answered Apr 24, 2020
Acc. to ncrt secondery oocyte has 23 chromosomes

Creative Brains. answered 3 weeks ago
The primary oocyte is diploid stage which divides meiotically to give rise to the secondary oocyte and polar body. This division leads to reduction in the number of chromosomes in the secondary oocyte stages and as a result, there are 23 chromosomes only and it is haploid in nature.
SO THE CORRECT ANSWER IS 23.

Vishnu Balekar answered Apr 22, 2020
Secondary oocyte are haploid hence contain 23 chromosomes.

Rakib Khan answered Sep 11, 2018
Diploid 46, so haploid secondary oocyte has 23 chromosomes. option C is correct

Gopikas S answered Apr 24, 2020
Spermatogonia are the cells on the inside wall of seminiferous tubules and consist of 46 chromosomes. Oogonia are also diploid and are formed in the fetal ovary. Zygote is also diploid and fertilised ovum formed by fusion of male and female gametes. Secondary oocyte has 23 chromosomes and is formed by meiosis-I of primary oocyte.

Swarnali Modak answered 1 week ago
Only secondary oocyte is haploid here...so has 23 chromosomes.

Himaja Ammu answered 2 weeks ago

Rakhi Chaudhary answered 3 days ago
Secondary oocyte
it have 23pair of chromosome

Devu Sss answered 2 weeks ago
Ans is c secondary oocyte is haploid others are diploid

Surendra Bishnoi answered Apr 08, 2020
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Priyanka Kalange answered 2 weeks ago
Ncert specifically mentioned No of secondary oocytes n=23

Mahak Agrawal answered 4 weeks ago
Spermatogonia are the cells on the inside wall of seminiferous tubules and consist of 46 chromosomes. Oogonia are also diploid and are formed in the fetal ovary. Zygote is also diploid and fertilised ovum formed by fusion of male and female gametes. Secondary oocyte has 23 chromosomes and is formed by meiosis-I of primary oocyte.
We know that the mitosis and meiosis are very related to a point. the difference is only in the copying and the distribution of the DNA. In mitosis the DNA is simply copied once and distributed in the two daughter cells but in meiosis two cell divisions occur in which half of the 46 chromosomes goes to the four daughter cells. After the 1st stage of the meiosis the eggs are called as Secondary oocyte.

Read more on Brainly.in - https://brainly.in/question/123125#readmore

Karthi R answered 3 weeks ago
It occurred in oogenesis process 2n Oogonia divide into primary oocyte(n) and 1st polar body Under meiosis condition
then primary oocyte under mitotic division(no change in chromosome number) to form secondary oocyte (n) and second polar body.so Option C is correct

Mohit Gupta answered 3 weeks ago
Secondary oocyte is a haploid structure formed from meiosis. this is formed with a polar body that contain half of the chromosome

Sonal Mestry answered Apr 13, 2020
Correct answer is C bcoz secondary oocyte divides to form 2 n ( 23 chromosomes) cells.

Rameshkumar Bhoi answered 1 week ago
Secondary oocyte has 23 chromosome

Gulzar Ahmad answered 3 days ago
Secondary oocyte is formed by the ist meiotic division of primary oocyte....since ist meiotic division is reductional in nature,so it is haploid i.e; possesses 23 chromosomes

Arshiya Firdose answered Mar 18, 2020
Because the secondary oocytes are formed by meiosis

Mahalakshmi Mahalakshmi answered Apr 04, 2020
Nucleus , during the primary oocyte stage of oogenesis the nucleus is called germinal vesicle . the only normal human type of secondary oocyte has the 23rd (sex chromosomes)as 23rd X-chromosome (female determineing where sperm can have 23Xfemale determing or 23Y male determining.

Virender Navariya answered Apr 23, 2019
Answer is option C
Reason: secondary oocyte is the result of reductional division ie meiosis in primary oocyte. Therefore secondary oocyte is haploid and contains half the chromosomes present in a diploid human cell ie 23 chromosomes.

Sonali Keshri answered May 23, 2019
Because meiosis take place

Snober Shawl answered 3 weeks ago
Secondary oocyte..bcz primary oocyte undergoes meiosis 1.leads to secondary oocyte and a 1st polar body

Sunil Katara answered Oct 09, 2019
Secondry oocyte

Rishu Verma answered Jan 29, 2019
Bcz among these only secondary oocyte is haloid ...spermatogonia is geminal cell which is diploid and after mitosis it form oogonia so it is also diploid and after fertilisation of ovum and sperm form zygote so it is also diploid

Samiullah Wani answered Apr 08, 2020
Spermatogonia
c

Lekshmi Lekshmi answered Sep 17, 2019
Human sperms egg contain 23 chromosome

Rupali Kothari answered Dec 22, 2019
C is correct ans be

Ravipati Sai Divya answered Jan 28, 2019
Spermatids develop into spermatozoa

Aaisha answered May 25, 2019
Zygote

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