Tag: biology

Questions Related to biology

Read the following statements.
(i) Birth control pills are likely to cause cardiovascular problems.
(ii) A woman who substitutes or takes the place -of the real mother to nurse the embryo is called surrogate mother.
(iii) Numerous children have been produced by in vitro fertilisation but with some abnormalities.
(iv) Woman plays a key role in the continuity of the family and human species.
(v) Foetal sex determination test should not be banned.
Which of the following pair consists of incorrect statement ?

biology reproductive health twins reproduction and modern technology stds and infertility

  1. (i) and (ii)

  2. (ii) and (iv)

  3. (iii) and (v)

  4. None of these

Show answer
Correct Option: C
Explanation:

Numerous children have been produced by in vitro fertilisation without any abnormality. Foetal sex determination test should be banned as it is being misused for female foeticide.

In invitro fertilization, the foetus are allowed to develop outside the body.

biology reproductive health twins reproduction and modern technology stds and infertility

  1. True

  2. False

Show answer
Correct Option: B
Explanation:

In in-vitro fertilization, only the male and female gametes fuse outside the female body. After the formation of zygote, it is transferred in the female body.  

So the correct answer is false.

Which of the following breeding techniques is used to improve herd genetics?

biology reproductive health twins reproduction and modern technology stds and infertility

  1. Artificial insemination

  2. Embryo transfer

  3. Both A and B

  4. None of the above

Show answer
Correct Option: C
Explanation:

Both the methods are used to improve the herd genetics by adding a new set of desired genes to the herd. This increases the quality of the gene pool of the herd.  

So the correct option is 'Both A & B'.

Transfer of ovum from donor to recipient oviduct is

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  1. GIFT

  2. ICSI

  3. ZIFT

  4. ET

Show answer
Correct Option: A
Explanation:

GIFT referred as a gamete intra Fallopian transfer. In this, the egg from the donor and the sperm from the father (or the donor male) is taken and are transferred to the oviduct or the Fallopian tube of the recipient. 

So the correct option is 'GIFT'.

Stage transferred to uterus after induced fertilization of ova in the laboratory is

biology reproductive health twins reproduction and modern technology stds and infertility

  1. Embryo at two-blastomere stage

  2. Morula

  3. Zygote

  4. Embryo at four blastomere stage

Show answer
Correct Option: B
Explanation:

In Intra-Uterine Transfer (IUT) embryo with more than 8-blastomeres stage (morula) is used for transfer into the uterus after induced fertilisation in the laboaratory.

So, the correct answer is 'Morula'.

Assisted reproductive technology, IVF involves transfer of

biology reproductive health twins reproduction and modern technology stds and infertility

  1. Zygote into fallopian tube

  2. Zygote into uterus

  3. Embryo with 16 blastomeres into the fallopian tube

  4. Ovum into fallopian tube

Show answer
Correct Option: A
Explanation:

In vitro fertilization is a method in which fertilization of male gamete (spermatozoon) and female gamete (ovum) outside the body in almost similar conditions as that in the body followed by zygote or embryo transfer(ET). The zygote or early embryo(upto 8 blastomeres stage) then transferred to fallopian tube called zygote intra fallopian transfer or ZIFT. So, the correct answer is 'Zygote into fallopian tube'.

Embryo with more than 16 blastomere formed due to in vitro fertilization is transferred into

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  1. Cervix

  2. Uterus

  3. Fallopian tube

  4. Fimbriae

Show answer
Correct Option: B
Explanation:

The zygote or early embryo (upto 8 blastomeres stage) is transferred to fallopian tube called zygote intra fallopian transfer or ZIFT. IUT (Intrauterine transfer), the embryo with more than 8 blastomeres is transferred into the uterus. So, the correct answer is 'Uterus'.

Consider the following statements.
In vitro micro propagation has the advantages of.
a. Range of variability
b. Year round availability
c. Small size of explants
d. Production of disease free prop gules.
Which of the statements given are correct?

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  1. $1, 2$ and $4$ only

  2. $2, 3$ and $4$ only

  3. $1$ and $3$ only

  4. $1, 2, 3$ and $4$

Show answer
Correct Option: A

Which one of the following technique has been widely used to overcome sexual incompatibility?

biology reproductive health twins reproduction and modern technology stds and infertility

  1. In vitro fertilization

  2. Geitonogamy

  3. Allogamy

  4. Xenogamy

Show answer
Correct Option: A

In vitro fertilisation is a technique that involves transfer of which one of the following into the Fallopian tube?

biology reproductive health twins reproduction and modern technology stds and infertility

  1. Embryo only, upto $8$ cell stage

  2. Either zygote or early embryo upto $8$ cell stage

  3. Embryo of $32$ cell stage

  4. Zygote only

Show answer
Correct Option: B
Explanation:

ZIFT ( Zygote Intrafallopian transfer) is a technique in which oocyte and sperms are taken and fertilization takes place outside the female's body i.e. in vitro. Early embryo with more than 8 blastomeres is transferred to the fallopian tube.

So the correct option is ' Either zygote or early embryo upto 8 cell stage '.