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Synthesis phase in the cell cycle is called so, because of the synthesis of more:
A. RNA
B. RNA and proteins
C. DNA
D. Glucose
“First meiotic division is the reduction division” what does the word ‘reduction’ refer to in this statement?
Expand the following biological abbreviations :
DNA
Choose the correct answer:
During mitosis which of the following disintegrate ___________
Choose the correct answer:
Minimum coiling in chromosome is at ________________
Why gametes have a haploid number of chromosomes?
What is the importance of meiosis?
Differentiate between
Chromatin and Chromosome.
Give Technical Terms
The stage when sister chromosomes separate from their paired condition.
Give Reason:
The Law of independent assortment holds good for the gene pairs that occur in different pairs of chromosomes.
Name the following:
Pairs of chromosomes, present in human egg cells.
Compare X chromosome and Y chromosome.
Match the following.
| 1. Autosomes | - | Trisomy 21 |
| 2. Diploid condition | - | 9 : 3 : 3 : 1 |
| 3. Allosome | - | 22 pair of chromosome |
| 4. Down’s syndrome | - | 2n |
| 5. Dihybrid ratio | - | 23rd pair of chromosome |
Explain the structure of a chromosome.
The sex of the newborn child is a matter of chance and neither of the parents may be considered responsible for it. What would be the possible fusion of gametes to determine the sex of the child?
In higher unisexual animals, one pair of chromosomes is not identical in two sexes. It is called as ______.
Which of the following is TRUE with respect to the genes which inherit together during crossing over?
Differentiate between X-chromosome and Y-chromosome with reference to –
- length of non-homologous regions
- type as per the position of the centromere
The chromosomes are duplicated in ______.
