Advertisements
Advertisements
Question
“First meiotic division is the reduction division” what does the word ‘reduction’ refer to in this statement?
Solution
In this statement, reduction means that the number of chromosomes are reduced to half i.e. out of the 23 pairs of chromosomes in humans, only single set of chromosomes are passed on to the sex cells.
APPEARS IN
RELATED QUESTIONS
Choose the ODD one out from the following terms given and name the CATEGORY to which the others belong
Centrosome.Cell wall, Cell membrane, Large vacuoles
Answer the following question in your own words.
What is meant by ‘chromosome’?
Chromosomes are mainly made up of ______.
Choose the correct answer:
Chromosomes number is halved in ____________
Mention the contribution of the scientist given below in the study of chromosome:
Sutton and Boveri
Write a sentence of the following:
Centromere
Label the lettered parts of the given figure and answer the following questions:
(i) What does this diagram represent?
(ii) What is the importance of'd'?
(iii) What are the 'staining' properties of 'b' and 'c'?
(iv) Who gave the term used for this structure today?
(v) What is a?
(vi) Is 'e' present in all chromosomes?
Choose the correct answer:
Chromosomes largely consist of _______________
Why gametes have a haploid number of chromosomes?
What is the importance of meiosis in creating variations?
Give a reason for the following:
Gametes must be produced by meiosis for sexual reproduction.
Explain the Term Centrioles
State the Location: Chromosomes
Give Reason:
The Law of independent assortment holds good for the gene pairs that occur in different pairs of chromosomes.
Name the following:
Pair of genes responsible for a particular characteristic.
Define euploidy.
Identify the TRUE statements with respect to aneuploidy.
- When the chromosome number is not the exact multiple of the haploid set, it is described as aneuploidy.
- Aneuploidy is only addition of one or more chromosome(s) to the total number of chromosomes in a cell.
- Aneuploidy is further classified as hypoploidy and hyperploidy.
The chromosomes are duplicated in ______.
After a mitotic cell division, a human female cell will have ______.
Distinguish between the following pair:
Karyotype and Karyokinesis