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प्रश्न
Male and female gametes are ______.
विकल्प
diploid
haploid
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उत्तर
Male and female gametes are haploid.
Explanation:
This means they have half as many chromosomes as diploid cells. During fertilisation, haploid gametes from both parents combine to form a diploid zygote with a full complement of chromosomes.
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संबंधित प्रश्न
What is oogenesis?
______ type of reproduction occurs without fusion of gametes.
Body breaks up into several fragments and each fragment starts to live as a new individual. This is ______ type of reproduction.
At the time of birth, there are _______________ oocytes in the ovary of a female foetus.
In meiosis, the number of chromosomes becomes ___________.
In angiosperms, the pollen germinates to produce a pollen tube that carries two gametes. What is the purpose of carrying two gametes when a single gamete can fertilize the egg?
If one pollen grain produces two male gametes, how many pollen grains are needed to fertilize 10 ovules?
Answer the following type of question Assertion (A) and Reason (R).
(A) - In human males, testes are extra-abdominal and lie in scrotal sacs.
(R) - Scrotum acts as a thermoregulator and keeps the temperature lower by 2°C for normal sperm production.
Which of the following enter the maturation phase of oogenesis?
The part labelled as ______ contains the energy source that facilitates sperm motility.
Formation of ____________ is an indication of the termination of oogenesis.
500 spermatozoa are formed from ____________ secondary spermatocytes.
Calculate the number of sperms and ova produced from 40 primary spermatocytes and 40 primary oocytes.
Identify the correct stages (P - S) in the given diagram of spermatogenesis.
Identify the CORRECT sequence of events.
Which of the following events take place during spermatogenesis?
How many autosomes does a human primary spermatocyte have?
Spermiation is the process of the release of sperm from ______.
During embryonic development, the establishment of polarity along anterior/posterior, dorsal/ventral or medial/lateral axis is called ______.
A reaction of granules content which harden the zona pellucida and ensures sure block to polyspermy is ______.
The head of the epididymis at the head of the testis is called ______.
In spermatogenesis, reduction division of chromosome occurs during conversion of ______.
Head of epididymis is called as ______.
The prostate gland and seminal vehicle perform the function of ______.
After the release of the secondary oocyte, the Graafian follicle develops into ______.
If for a species 2n = 16, then during Ist prophase and IInd prophase of the meiotic division of a cell, how many tetrads and diads will be formed:
During reproduction, the chromosome number (2n) reduces to half (n) in the gametes and again the original number (2n) is restored in the offspring. What are the processes through which these events take place?
Given below are two statements.
- Statement I: The spermatids are non-motile and non-functional which get transformed into functional spermatozoa by the process of spermiogenesis.
- Statement II: During the process of this change, the spermatids remain held to each other and to Leydig's cells by cytoplasmic bridges.
In light of the above statements, select the correct answer from the option given below.
In our society the women are often blamed for giving birth to daughters. Can you explain why this is not correct?
