Download App

STD 11 - 10. Cell cycle and cell division — BIOLOGY STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceBIOLOGYSTD 11 - 10. Cell cycle and cell division1 Mark
MCQ
Crossing over occurs at
  • A
    Single strand stage
  • B
    Two strand stage
  • ✓
    Four strand stage
  • D
    Eight strand stage
✓

Answer

Correct option: C.
Four strand stage
c
During pachytene substage of prophase$-I$ of meiosis, the chromosomes are tetravalent i.e., contain two chromatids with each chromosome arms. Crossing over during this substage, which involves the exchange of segments between the non-sister chromatid of homologues.

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 "M.C.Q (1 Marks)" from STD 11 - 10. Cell cycle and cell division→STD 11 - 10. Cell cycle and cell division — all question types→BIOLOGY STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

This is absent in female frog.
→
The minimum amount of energy required to initiate a chemical reaction is called:
→
The unit of photosynthesis is:
→
First vertebrae in human is called
→
Read the different components from $(i)$ to $(iv)$ in the list given below and tell the correct order of the components with reference to their arrangement from outer side to inner side in a woody dicot stem.

$(i)$ Secondary cortex $(ii)$ Wood $(iii)$ Secondary phloem $(iv)$ Phellem The correct order is

→
Which of the following would occur when a plant cell is packed in a fluid with high osmotic concentration than the cell sap?
→
The hormone which brings about characteristic changes in the male at puberty is called
→
Basically how many types of enzymes have been recognised by International Union of Biochemistry
→
Which of the following is not correctly matched?
→
Early wood is formed in dicot plant during
→