Chapter Chosen

Cell Cycle and Cell Division

Book Chosen

Biology

Biology

Download books and chapters from book store.
Currently only available for.
CBSE Gujarat Board Haryana Board

Download the PDF Question Papers Free for off line practice and view the Solutions online.
Currently only available for.
Class 10 Class 12

Name the sub-stage of meiosis in which crossing over takes place.

Pachytene.

199 Views

Name the process in which there is an exchange of genetic material between non-sister chromatids of homologous chromsomes during meiosis.

Crossing over.

978 Views

What is polyteny ?

Polytene chromosomes are giant chromosomes which are formed due to repeated DNA replication without cell division. They are found in some insects.

708 Views

What are two types of cells on the basis of presence or absence of nucleus ?

On the basis of the presence and absence of nucleus the cells are divided into two types Eukaryotic and prokaryotic cells.

533 Views

Namethe five phases of of Prophase I.

The five phases of prophase 1 are
i. Leptotene
ii. Zygotene
iii. Pachytene
iv. Diplotene
v. Diakinesis.

620 Views

Name an important event that occurs during meiosis and not during mitosis.

Crossing over takes place during meiosis but not during mitosis.

530 Views