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Question
Mention the contribution of the scientist given below in the study of chromosome:
Strasburger
Solution
Strasburger - He observed thread like structures during cell division.
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RELATED QUESTIONS
Give appropriate biological or technical terms for the following :
The condition in which a pair of chromosomes carries similar alleles of a particular character.
Choose the best option out of the four alternatives a, b, c and d
Question 1:
The number of chromosomes in a certain type of cell division is halved. This kind of cell
division occurs in.
(a) Only testis
(b) Only ovary
(c) Both ovary and testis
(d) All body cells
The component which is in the nuclei of cells and carries the hereditary characteristics is called ______.
Choose the correct answer:
In an interphase cell chromosome are as _____________
Why gametes have a haploid number of chromosomes?
Give Reasons for the following
Chromosomes are the carriers of heredity.
Differentiate between
Chromatin and Chromosome.
Give Technical Terms
The stage at which synapsis in chromosomes to form bivalents.
State the Location: Chromosomes
State the Location: Polytene chromosome
Write the functional activity of the following structure:
Spindle fibers
Name the following:
Pair of genes responsible for a particular characteristic.
Very Short Answer Question.
What is allosome?
Nullisomy is represented by ______.
Describe the structure of sex chromosomes with the help of labelled diagram.
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.
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
