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Karnataka Board PUCPUC Science 2nd PUC Class 12

How many eggs do you think were released by the ovary of a female dog which gave birth to 6 puppies? - Biology

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Question

How many eggs do you think were released by the ovary of a female dog which gave birth to 6 puppies?

Short Answer
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Solution

Because dogs have multiple births, several eggs develop and are birthed together. If the egg is fertilised, it will implant in the uterine wall. Dogs have litters about nine weeks after fertilisation, and the gestation period can last anywhere from 56 to 72 days. A typical litter contains approximately six puppies, though this number can vary greatly depending on the breed of dog. On this basis, a female dog’s ovary produced 6 eggs, resulting in the birth of 6 puppies.

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Chapter 3: Human Reproduction - NCERT EXERCISES [Page 117]

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Nootan Biology [English] Class 12 ISC
Chapter 3 Human Reproduction
NCERT EXERCISES | Q 21. | Page 117

RELATED QUESTIONS

Write two major functions of ovary.


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Sperm; implantation; fertilization; ovum; ovum; after birth. 


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Uterus and vegina 


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The onset of reproductive phase in a female. 


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Give reasons :
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Organ producing ovum.


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In 28 days human ovarian cycle, ovulation occurs on ______.


The opening of the vagina is often covered partially by a membrane called ______.


The finger-like projections, called fimbriae, help in the collection of ovum into the fallopian tube following ovulation.


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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.

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P. Fusion of cortical granules with the plasma membrane of secondary oocyte.

Q. Formation of fertilization cone to receive sperm.

R. Release of sperm lysin from acrosome.

S. Mixing up of chromosomes of a sperm and an ovum.


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Which among the following is not the function of testes at puberty?

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Leydig cells : Testosterone : ______ : Oestrogen.


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