Download App

PART - 2 CH - 8 Heredity — Science STD 10 — Question

Gujarat BoardEnglish MediumSTD 10SciencePART - 2 CH - 8 Heredity3 Marks
Question
Define:
Sex determination
✓

Answer

The phenomenon of determining the sex of an individual of a species is called sex determination.
• There are different strategies e.g., temperature, chromosomes, genes, hormones, etc. responsible for determining the sex in certain animals.
• In certain animals, the sex determination is not genetically determined. e.g., the Snails can change their sex.
• In human beings in each cell there are 22 pairs of autosomes and 1 pair of sex chromosomes. The 23rd pair is either XX as in females or XY as in males.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "[3 Mark Questions]" from PART - 2 CH - 8 Heredity→PART - 2 CH - 8 Heredity — all question types→Science STD 10 question papers→Gujarat Board STD 10 question papers→Gujarat Board question paper generator→

Similar questions

(1) Write the electron-dot structures for sodium, oxygen and magnesium.
(2) Show the formation of Na2O and MgO by the transfer of electrons.
(3) What are the ions present in these compounds?
→
Explain the Newlands’ law of octaves.
→
Can you think of reasons why more complex organisms cannot give rise to new individuals through regeneration?
→
Explain the term refractive index.###Explain the relative refractive index
→
Ramesh has two daughters and his wife Maya is pregnant again. He desires to have a son. So he forces his wife Maya to go for sonography for sex determination of the child.
Answer the questions based on this information.
(1) Who is responsible for the birth of a girl or boy child, father's or mother's sex chromosome?
(2) In case of Ramesh's daughters, which set of sex chromosome is not present in them?
(3) Is sex determination test illegal? Why?
→
Which information have been obtained from the study of human evolution?
→
State the properties of animal hormones.
→
Name and state the rule which determine the direction of magnetic field around a straight current-carrying conductor. Also draw diagram
→
Why does the cord of an electric heater not glow while the heating element does ?
→
with a neat labelled ray diagram. Describe the position and nature of the image formed when an extended object is kept between $F_{1}$ and $2F_{1}$ in front of a convex lens.
→