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
74 Answers
Aiims New Delhi answered Jun 01, 2018
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Yash Rathore answered Aug 30, 2018
Secondary oocyte

Sathvika Tadri answered Jun 26, 2020
Secondary oocyte has 23 chromosomes.. whereas zygote, spermatogonia, oogonia have 46 chromosomes..so option C is the answer

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

Swaranjali Karandikar answered May 04, 2020
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.

Bhaskar Ala answered Jun 06, 2020
Secondary spermatocyte is in haploid state bcz already 1st meiotic division completed by primary spermatocyte diploid state converted into haploid secondary spermatocyte....

Jyoti Rani answered Jun 27, 2020
Because in primary oocyte(2n) meiosis 1has completed and become secondary oocyte so in meiosis 1 the chromosome no. become half so we can say that the secondary oocyte os haploid Or n..

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

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

Ashok Kande answered Jun 26, 2020
Secondary oocyte option c

Akshitha answered 3 weeks ago
Option "c" is correct,oogonia undergoes Mitosis differention----> primary oocyte(2n)-46 undergoes 1st meiotic division---> secondary oocyte(n)-23 chromosomesa nd polar body

Sudeep Badiger answered Aug 14, 2020
C. Secondary oocyte

Richa Borah answered Jun 21, 2020
It is clearly mentioned in NCERT and secondary oocytes will be the answer

Vaishnavi answered 4 weeks ago
Option c secondary oocyst because it consits of 46 chromosomes and that would be 23 chromosome

Amrutha Menon answered May 06, 2020
Primary oocyte( 2n =46) undergo reduction division and forms secondary oocyte (n=23)

Mary Priya answered Jun 26, 2020
Zygote,oogonia,spermatogonia are diploid. only secondary oocyte is haploid.

Sagarika Nayak answered Sep 18, 2018
Spermatogonia

Shatabdi Malik answered Apr 22, 2020

Abhishek Nirmal answered Jul 29, 2020
Secondary oocyte..

Kruti Patel answered Aug 16, 2020
Secondary ooctye....as meiosis divsion takes place and a polar body is released

Sunil Jakhar answered Apr 30, 2020
Bro sec oocyte hoga answer ploidy .se pta krle bro

Mahesh Mahajan answered 2 weeks ago
It's 23 chromosomes in secondry oocyte

Sharath Raj answered 3 weeks ago
Secondary oocyte is haploid (1n) _23 chromosomes
Remaining all three are diploid (2n)_46 chromosomes

Bindu Bhavani answered Aug 07, 2020
Secondary oocyte have 23chromosomes

Sai Kumar answered Jul 06, 2020
C is the right answer

Prakash. V Gowda answered Jul 02, 2020
C is correct answer because secondary oocyte - tertiary oocyte - graffion follicle - Marola - blastocyst - embryo

Piya Thakur answered Jul 12, 2020
Right answer is Oogonia!!! Oogonia are diploid and are formed in the fetal ovary.

Ramesh Karmagum answered Jun 28, 2020
Secondary oocyte.

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

Himaja Ammu answered May 17, 2020

Creative Brains. answered May 05, 2020
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.

Ved Parkash Bishnoi answered Jul 14, 2020
Secondary oocyte has 23 chromosome except this all other are diploid having 46 chromosome

Swarnali Modak answered May 19, 2020
Only secondary oocyte is haploid here...so has 23 chromosomes.

Rakhi Chaudhary answered May 22, 2020
Secondary oocyte
it have 23pair of chromosome

Abirami Thangaraj answered 4 weeks ago
Yes , option C is correct.

Devu Sss answered May 17, 2020
Ans is c secondary oocyte is haploid others are diploid

Vishwas Vishwas answered Jul 23, 2020
At this time the primary oocyte within the tertiary follicle grows in size and completes its first meiotic division and form the secondary oocyte. so the 23chromosomes is secondary oocyte

Surendra Bishnoi answered Apr 08, 2020
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Mahak Agrawal answered Apr 30, 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.
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 May 06, 2020
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

Priyanka Kalange answered May 15, 2020
Ncert specifically mentioned No of secondary oocytes n=23

Mabil Mohd answered Jul 22, 2020
Secondry oocyte complete miosis 1 cell division
and rhey are deploid

Shweta Mitta answered 3 weeks ago
Secondary oocytegiven in ncert figure in human reproduction

Gulzar Ahmad answered May 23, 2020
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

Mohit Gupta answered May 09, 2020
Secondary oocyte is a haploid structure formed from meiosis. this is formed with a polar body that contain half of the chromosome

Rameshkumar Bhoi answered May 19, 2020
Secondary oocyte has 23 chromosome

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

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

Samsher Singh answered Jul 13, 2020
Secoundry ouscte

Sunil Katara answered Oct 09, 2019
Secondry oocyte

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 May 06, 2020
Secondary oocyte..bcz primary oocyte undergoes meiosis 1.leads to secondary oocyte and a 1st polar body

Manju Singh answered Jun 06, 2020
Secondary oocyte as it is formed by 1st meiotic division so it is haploid

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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