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प्रश्न
Name the two types of twins.
Give the names:
Types of twins.
Name the following:
Two types of twins.
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उत्तर १
Monozygotic twins and Dizygotic twins
उत्तर २
Identical twins and Fraternal twins
APPEARS IN
संबंधित प्रश्न
Draw a labelled diagram of the female reproductive system.
How many eggs are released by a human ovary in a month? How many eggs do you think would have been released if the mother gave birth to identical twins? Would your answer change if the twins born were fraternal?
Give the names.
Hormones secreted by the ovary of the female reproductive system.
After puberty human female shows cyclic changes in her reproductive system. Explain structural and hormonal changes in the uterus.
(OR)
Give reasons :
(1) Scrotal sac serves as thermoregulator.
(2) Corpus luteum gets converted into corpus albicans in absence of fertilization.
(3) Missing of menses is the first indication of pregnancy.
(4) Surgical sterilization is a permanent method of birth control. (5) Human egg is microlecithal.
Name the Following
The structure formed after the release of ovum from the Graffian follicle.
Name the Following
The term used for the mature follicles.
Complete the following sentences with appropriate word:
A hormone secreted in a female to facilitate parturition is ________.
Write the functional activity of the following structure:
Graafian follicle
What is true of gametes?
Estrogen is secreted by ______
The implantation of the embryo occurs at about ______ days of fertilization.
Identify the distal narrow part of the duct opening into the uterus.
Penis is homologous to ____________.
Which of the following is ectodermal in origin?
| (i) | Heart |
| (ii) | Sweat glands |
| (iii) | Adrenal medulla |
| (iv) | Middle ear |
| (v) | Urinary bladder |
| (vi) | Dermis of skin |
The part of fallopian tube closest to the ovary is ______.
Ovulation occurs under the influence of ______.
Stratum germinativum is an example of which kind of epithelium?
After birth, colostrum is released from mammary glands which is rich in ______.
The opening of the vagina is often covered partially by a membrane called ______.
To answer the question, study the graphs below for Subjects 1 and 2 showing different levels of certain hormones.
Which structure in the ovary will remain functional in subject 2?
To answer the question, study the graphs below for Subjects 1 and 2 showing different levels of certain hormones.
For subject 2 it is observed that the peak for hormone B has reached the plateau stage. After approximately how much time will the curve for hormone B descend?
Read the following and answer from given below:
During copulation, semen is released by the penis into the vegina. The motile sperms swim rapidly, fuse with the ovum in the ampullary region, resulting in fertilization. The haploid nucleus of sperm fuses with that of the ovum to form a diploid zygote.
Site of fertilization in human is ______
Draw a neat diagram of the female reproductive system and label the parts associated with the following:
(a) production of gamete
(b) site of fertilisation
(c) site of implantation
(d) birth canal
The vaginal orifice is covered by a fold of membrane called hymen ______.
Bartholin's glands are homologous to ______.
The ______ is also called the womb.
The______ is also called the womb.
The ______ is also called the womb.
The ______ is also called the womb.
