Tag: for the continuity of generation

Questions Related to for the continuity of generation

The process of union of male gamete with egg cell is called ________.

biology for the continuity of generation fertilization in human being fertilization in humans human fertilization

  1. Fertilization

  2. Pollution

  3. Double fertilization

  4. Germination

Show answer
Correct Option: A
Explanation:

The process in which union of male and female gametes (formed by gametogenesis) and fusion of pronuclei of sperm and egg (ovum) takes place is called fertilization. The resultant product of fertilization is called zygote 

Which of the following is a correct sequence of events that occur in human reproduction? 

biology for the continuity of generation fertilization in human being fertilization in humans human fertilization

  1. Gametogenesis $\rightarrow$ Gestation $\rightarrow$  Insemination $\rightarrow$ Fertilisation $\rightarrow$ Implantation $\rightarrow$ parturition

  2. Gametogenesis $\rightarrow$Insemination$\rightarrow$ Fertilisation $\rightarrow$ Implantation $\rightarrow$ Gestation $\rightarrow$ parturition

  3. Gametogenesis $\rightarrow$ Insemination$\rightarrow$ Gestation $\rightarrow$ Fertilisation $\rightarrow$ Implantation $\rightarrow$ parturition

  4. Gestation $\rightarrow$ Gametogenesis $\rightarrow$ Insemination  $\rightarrow$ Implantation $\rightarrow$ Fertilisation $\rightarrow$ parturition

Show answer
Correct Option: B
Explanation:

The sequence of events occurring in case of Human reproduction are:

Gametogenesis is the process of formation of gametes from germ cells.
Insemination is the deposition of semen containing sperm into the vagina of female.

Fertilisation is the process of fusion of male and female gametes for the formation of zygote.
Implantation is the process of embedding of formed zygote after fertilisation into the endometrium of the uterus.
Gestation is the process of development of the foetus inside the uterus till till it is fully developed to be delivered.
Parturition is the process of delivery of fully formed foetus.
So, the correct answer is 'Gametogenesis $\rightarrow$ Insemination $\rightarrow$ Fertilisation $\rightarrow$ Implantation $\rightarrow$ Gestation $\rightarrow$ Parturition'.

In which one of the following parts of the female reproductive system  fertilization takes place? 

biology for the continuity of generation fertilization in human being fertilization in humans human fertilization

  1. Uterus

  2. Oviduct

  3. Vagina

  4. Ovary

  5. None of these

Show answer
Correct Option: B
Explanation:

the site of fertilization ( union of male of female gametes) in human beings is in the Fallopian tube/ Oviduct ( specifically the ampullary-isthmic junction) in the female reproductive tract.

So, the correct option is 'Oviduct'.

State true or false

 
(i) A zygote is always formed inside the body.
(ii) Zygote may represent "overwintering stage" in life cycle of an organism

biology for the continuity of generation fertilization in human being fertilization in humans human fertilization

  1. True

  2. False

Show answer
Correct Option: B
Explanation:
A zygote is formed inside the body if the fertilization is internal and it can also develop outside the body if the fertilization is external. Overwintering stage is the process by which some organisms pass through or wait out the winter season. But zygote does not represent the overwintering stage in the life cycle of the organism.
So the correct answer is 'False'.

All copulations do not lead to fertilization and pregnancy because?

biology for the continuity of generation fertilization in human being fertilization in humans human fertilization

  1. All mating does not result in transport of sperm and ovum simultaneously at ampulla

  2. Survival duration of both sperm and ovum is same

  3. Number of sperms and ovum varies

  4. None of these

Show answer
Correct Option: A
Explanation:
All copulation does not lead to fertilization and pregnancy because all mating does not result in transport of sperm and ovum simultaneously at ampulla.
The ovum has to be present in the ampulla of fallopian tube, so when the sperm reaches, it fertilizes and causes pregnancy.
It is very important for sperm and ovum to be present at the same time in ampulla, to cause fertilization and pregnancy.
Correct Answer -[A] option.

A human zygote has 

biology for the continuity of generation fertilization in human being fertilization in humans human fertilization

  1. 46 chromosomes

  2. 23 chromosomes

  3. 47 chromosomes

  4. 48 chromosomes

Show answer
Correct Option: A
Explanation:

Zygote or the fertilized egg cell results from the union of a female gamete (Egg or ovum) with a male gamete (sperm). The number of chromosomes in the gamete is haploid and human gametes contain 23 chromosomes. As zygote is from the fusion of two gametes, the chromosome number is diploid and is double of that in gamete and thus has 46 chromosomes.

The number of nuclei present in a zygote is 

biology for the continuity of generation fertilization in human being fertilization in humans human fertilization

  1. None

  2. One

  3. Two

  4. Four

Show answer
Correct Option: B
Explanation:

A zygote is a cell formed when two gamete cells are fused by means of sexual reproduction. Here, the sperm nucleus fuses with the egg nucleus to form a single zygote nucleus.
Thus, the correct answer is option B.

A new human individual develops from a cell called as gamete.

biology for the continuity of generation fertilization in human being fertilization in humans human fertilization

  1. True

  2. False

Show answer
Correct Option: B
Explanation:

A gamete is a haploid cell that fuses with another cell during fertilization in organisms and results in the formation of a diploid zygote. This zygote is the earliest developmental stage of embryo form which the organism develops.
Thus, the correct answer is option B.

A zygote is formed as a result of fertilization.

biology for the continuity of generation fertilization in human being fertilization in humans human fertilization

  1. True

  2. False

Show answer
Correct Option: A
Explanation:

A zygote is a diploid cell that is formed by the fusion of male and female haploid gamete cells. The process of fusion of gametes is known as fertilisation
So, the correct answer is 'True'

Egg laid after fertilization is diploid.

biology for the continuity of generation fertilization in human being fertilization in humans human fertilization

  1. True

  2. False

Show answer
Correct Option: A
Explanation:

Fertilisation is the fusion of male and female gametes with the mixing of the 23 male and 23 female chromosomes. The zygote has 46 chromosomes so they are diploid in nature.
Thus, the correct answer is option A.