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Germ cells in mammalian gonads are produced by

Question

Easy

Solving time: 1 mins

Germ cells in mammalian gonads are produced by

Only mitosis

Only meiosis

Mitosis and meiosis both

Without cell division

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Book:

Biology-for-NEET-Volume-2-Class-XII

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Text solutionVerified

[C] Spermatogonia/oogonia are produced by mitotic cell division while spermatids and ova are produced after meiotic cell division.

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Practice questions from Biology-for-NEET-Volume-2-Class-XII

Question 1

Easy

If both ovaries are removed from a rat, then which hormone is decreased in blood

Oxytocin
Estrogen
Prolactin
Gonadotrophic

Topic:

Human Reproduction

Book:

Biology-for-NEET-Volume-2-Class-XII

View solution

Question 2

Easy

Supporting cells found in between the germinal epithelium of testes are called

Interstitial cells of Leydig
Sertoli cells
Granular cells
Phagocytes

Topic:

Human Reproduction

Book:

Biology-for-NEET-Volume-2-Class-XII

View solution

Question 3

Medium

The difference between spermiogenesis and spermiation is -

In spermiogenesis spermatids are formed, while in spermiation spermatozoa are formed.
In spermiogenesis spermatozoa are formed, while in spermiation spermatids are formed.
In spermiogenesis spermatozoa from sertoli cells are released into the cavity of seminiferous tubules, while in spermiation spermatozoa are formed.
In spermiogensis spermatozoa are formed, while in spermiation spermatozoa are relaeased from sertoli cells into the cavity of seminiferous tubules.

Topic:

Human Reproduction

Book:

Biology-for-NEET-Volume-2-Class-XII

View 2 solutions

Question 4

Easy

The correct sequence in the process of development is

fertilization - zygote - cleavage morula - blastula - gastrula
fertilization - cleavage - morula zygote - blastula - gastrula
fertilization - zygote - blastula morula - cleavage - gastrula
cleavage - zygote - fertilization morula - blastula - gastrula

Topic:

Human Reproduction

Book:

Biology-for-NEET-Volume-2-Class-XII

View solution

Practice more questions from Human Reproduction

Question 1

Easy

The accompanying diagram shows the changes that take place in the endometrium during a normal menstrual cycle.

Arrow represents ovulation- A
Arrow represents menstruation- B
Arrow represents ovulation- A
Arrow represents menstruation- C
Arrow represents ovulation- C
Arrow represents menstruation- B
Arrow represents ovulation- B
Arrow represents menstruation- D

Topic:

Human Reproduction

Book:

Dr. Ali Objective Biology

View 4 solutions

Question 2

Medium

Which of the following is correct about mammalian testes ?

Graafian follicles, Sertoli cells, Leydig's cells
Graafian follicles, Sertoli cells, Seminiferous tubules
Sertoli cells, Seminiferous tubules, Leydig's cells
Graafian follicles, Leydig's cells, Seminiferous tubules

Topic:

Human Reproduction

Book:

Biology-for-NEET-Volume-2-Class-XII

View 2 solutions

Question 3

Hard

Oxygenated blood flowing in umbilical chord of mammalian embryo is

50% maternal and 50% foetal
100% maternal
100% foetal
75% maternal and 25% foetal

Topic:

Human Reproduction

View 3 solutions

Question 4

Easy

Match Column-I with Column-II and select the correct option from the codes given below.
Column-I Column-II
A. Cleavage (i) Fertilization
B. Morula (ii) Mitotic divisions
C. Polyspermy (iii) Endometric
D. Implantation (iv) Little mulberry

A-(ii), B-(iv), C-(i), D-(iii)
A-(i), B-(iv), C-(ii), D-(iii)
A-(iv), B-(ii), C-(i), D-(iii)
A-(ii), B-(iv), C-(iii), D-(i)

Topic:

Human Reproduction

Book:

Chapterwise DPP Sheets for Biology NEET (Disha)

View solution

Practice questions on similar concepts asked by Filo students

Question 1

Glucose 1-phosphate is onverted into fructose 6 -phosphate in two successive reactions: Glucose 1-phosphate

⟶

glucose 6 -phosphateGlucose 6 -phosphate

⟶

fructose 6 -phosphate Using the

Δ G^{' \circ}

values in Table

13 - 4

, calculate the equilibrium constant,

K_{eq}^{'},

for the sum of the two reactions:Glucose 1-phosphate

⟶

fructose 6 -phosphate

Topic:

Biology

View solution

Question 2

To which of the following types of animals are Salamanders closely related? [2007-III]

Dolphins and Whales
Frogs and Toads
Prawns and Crabs
Seals and Walruses

Topic:

Diversity in the Living World

View solution

Question 3

What would be an example of sex selection through an evolutionary sense or the evolution of a unique life or life history or parental care. -Include background info on axon -Specifics on the sex selection, life history, or parental care -How this situation evolved Will like!

Topic:

Biology

View solution

Question 4

How can you explain this process?

Nrl-GFP
Nrl-GFP & COXIV
I-GFP
See this image and copyright information in PMC Figure 2. The relative location of the rod and cone outer segments, and myoid and ellipsoid regions of inner segments in the adult mouse retina are presented: electron and confocal microscopy images. Note that the cone OSs are located in the same layer as the rod inner segments (RISs). A: Low-magnification electron micrograph of a longitudinal section of the entire photoreceptor layer. Note the presence of cone OSs in the rod IS layer (white arrows) and the perinuclear mitochondria of the cones (white arrowheads). B: All compartments of the rods in the neural retina leucine zipper-green fluorescent protein (Nrl-GFP) transgenic mouse are fluorescent for GFP. C: Cytochrome oxidase subunit IV (COX IV) immunoreactivity (IR) colocalizes in the mitochondria-rich rod IS ellipsoid region and the OPL of Nrl-GFP transgenic mice (yellow-orange pixels). White arrowheads identify the cone perinuclear mitochondria. D: High-magnification image of Nrl-GFP transgenic mouse retina shows cone S-opsin-IR in the rod IS layer. E: High magnification of a retina double-labeled with COX IV and cone arrestin (M-CAr shows cones (green pixels) in the rod IS ellipsoid region. White arrowheads identify the colabeled cone perinuclear mitochondria. A, scale bar = 10m. B and C, scale bar = 40 um. D and E, scale bar = 20m. ELM = external limiting membrane, ellip = ellipsoid, ISs = inner segments, myo = myoid, ONL = outer nuclear layer, OPL = outer plexiform layer, OSs = outer segments.

Topic:

Biology

View solution