12910.Which of the following is incorrect regarding vasectomy?
Irreversible sterility
No sperm occurs in seminal fluid
No sperm occurs in epididymis
Vasa deferentia is cut and tied
Explanation:
Vasectomy is a type of contraception in which small part of vas deferens is removed or tied up through a small incision on scrotum due to which semen is without sperms, but sperms are present in epididymis.
Vasectomy is a type of contraception in which small part of vas deferens is removed or tied up through a small incision on scrotum due to which semen is without sperms, but sperms are present in epididymis.
12911.Embryo with more than 16 blastomeres formed due to in vitro fertilization is transferred into
cervix
uterus
fallopian tube
fimbriae
12912.Which of the following depicts the correct pathway of transport of sperms?
Efferent ductules → Rete testis → Vas deferens → Epididymis
Rete testis → Efferent ductules → Epididymis → Vas deferens
Rete testis → Epididymis → Efferent ductules → Vas deferens
Rete testis → Vas deferens → Efferent ductules → Epididymis
12913.Match Column-I with Column-II and select the correct option using the codes given below :
Codes:
a b c d
| Column-I | Column-II |
|---|---|
| a. Mons pubis | (i) Embryo formation |
| b. Antrum | (ii) Sperm |
| c. Trophectoderm | (iii) Female external genitalia |
| d. Nebenkern | (iv) Graafian follicle |
Codes:
a b c d
(i) (iv) (iii) (ii)
(iii) (iv) (ii) (i)
(iii) (iv) (i) (ii)
(iii) (i) (iv) (ii)
Explanation:
Mons pubis - Female external Genitalia.
Antrum - Graafian Follicle
Trophectoderm - Embryo Formation
Nebenkern - Sperm
Mons pubis - Female external Genitalia.
Antrum - Graafian Follicle
Trophectoderm - Embryo Formation
Nebenkern - Sperm
12914.Several hormones like hCG, hPL, estrogen, progesterone are produced by
pituitary
ovary
placenta
fallopian tube
12915.If a colour-blind man marries a woman who is homozygous for normal colour vision, the probability of their son being colour-blind is
1
zero
0.5
0.75
Explanation:
Colour blind man (XcY) with Normal homozygous woman (XX) → Son (XY) (normal vision)
Son receives Y chromosome from father and X chromosomes from mother, hence he has zero probability of being colour-blind.
Colour blind man (XcY) with Normal homozygous woman (XX) → Son (XY) (normal vision)
Son receives Y chromosome from father and X chromosomes from mother, hence he has zero probability of being colour-blind.
12916.Genetic drift operates in
slow reproductive population
small isolated population
large isolated population
non-reproductive population
12917.In Hardy-Weinberg equation, the frequency of heterozygous individual is represented by
q2
p2
2pq
pq
12918.The chronological order of human evolution from early to the recent is
Australopithecus → Homo habilis → Ramapithecus → Homo erectus
Australopithecus → Ramapithecus → Homo habilis → Homo erectus
Ramapithecus → Australopithecus → Homo habilis → Homo erectus
Ramapithecus → Homo habilis → Australopithecus → Homo erectus
12919.Which of the following is the correct sequence of events in the origin of life?
I. Formation of protobionts
II. Synthesis of organic monomers
III. Synthesis of organic polymers
IV. Formation of DNA-based genetic systems
I. Formation of protobionts
II. Synthesis of organic monomers
III. Synthesis of organic polymers
IV. Formation of DNA-based genetic systems
II, III, IV, I
II, III, IV
I, III, II, IV
II, III, I, IV
Explanation:
In the origin of life, the correct sequence of events is :
I : Synthesis of organic monomers.
II : Synthesis of organic polymers.
III : Formation of protobionts
IV : Formation of DNA based genetic systems
In the origin of life, the correct sequence of events is :
I : Synthesis of organic monomers.
II : Synthesis of organic polymers.
III : Formation of protobionts
IV : Formation of DNA based genetic systems