Tag: biology

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

Fertilization in humans is practically feasible only if

  1. the ovum and sperms are transported simultaneously to ampullary - isthmic junction of the fallopian tube

  2. the ovum and sperms are transported simultaneously to ampullary - isthmic junction of the cervix
  3. the sperms are transported into cervix within $48$ hours of release to ovum in uterus

  4. the sperms are transported into vagina just after the release of ovum in fallopian tube.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Ampulla averages 5–8 cm in length. It is within this highly ciliated portion of the oviduct that fertilization and early embryo development occur. The ampulla is most often also the site for ectopic implantation (ectopic pregnancy). The next region, approximately 2–3 cm in length, is the isthmus. Like the ampulla, it too is ciliated yet less densely so. The isthmus is thought to regulate sperm and embryo transport.
So, the correct option is 'the ovum and sperms are transported 'simultaneously to ampullary - isthmic junction of the fallopian tube'
Multiple choice biology for the continuity of generation fertilization in human being fertilization in humans human fertilization

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

  1. Fertilization

  2. Pollution

  3. Double fertilization

  4. Germination
Reveal answer Fill a bubble to check yourself
A Correct answer
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 

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

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

  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
Reveal answer Fill a bubble to check yourself
B Correct answer
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'.

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

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

  1. Uterus

  2. Oviduct

  3. Vagina

  4. Ovary

  5. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
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'.

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

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

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
B Correct answer
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'.
Multiple choice biology for the continuity of generation fertilization in human being fertilization in humans human fertilization

All copulations do not lead to fertilization and pregnancy because?

  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
Reveal answer Fill a bubble to check yourself
A Correct answer
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.
Multiple choice biology for the continuity of generation fertilization in human being fertilization in humans human fertilization

A human zygote has 

  1. 46 chromosomes

  2. 23 chromosomes

  3. 47 chromosomes

  4. 48 chromosomes
Reveal answer Fill a bubble to check yourself
A Correct answer
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.

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

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

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
B Correct answer
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.