Advertisements
Advertisements
प्रश्न
Multiple Choice Question
Chromosomal aberrations are caused by:
पर्याय
Change in the structure of the gene.
Change in the number of chromosomes.
Change in the arrangement or position of genes.
Change in the number or arrangement of genes in the chromosome.
उत्तर
Change in the number or arrangement of genes in the chromosome.
APPEARS IN
संबंधित प्रश्न
The term “chromosomes” literally means ______.
During the pairing of chromosomes in meiosis, the ________ chromosomes come to lie side by side.
Mention whether the following statement is (T) Or (F). Give reason in support of your answer.
The unfertilized human egg has half the number of chromosomes of the body cells.
Choose the correct answer:
Centromere is related to ________
Choose the correct answer:
Telocentric chromosomes are _________________
Enumerate the various changes that occur in the nucleus of the cell during prophase.
Differentiate between
Gametic meiosis and Zygotic meiosis.
Explain the Term Centrioles
Explain the Term Chromosomes
Give Technical Terms
The stage when sister chromosomes separate from their paired condition.
Write the functional activity of the following structure:
Chromosome
Write the functional activity of the following structure:
Chromosomes
Explain the structure of chromosomes with labelled diagram.
The thin thread-like structures found in the nucleus of each cell are called ______.
Some of the chromosomes have an elongated knob-like appendages known as telomere.
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 |
Generally, the recessive character is expressed only when present in a double recessive condition i.e. homozygous condition. However, a single recessive gene can express itself in human beings when the gene is present on ______
Normally, genes occur in a pair of chromosome, but genes of X and Y chromosomes shows different gene loci indicating ______.
