Advertisements
Advertisements
प्रश्न
Distinguish between X andY chromosomes. (Mention any 'two' points.)
Advertisements
उत्तर
| No | X Chromosome | Y chromosome |
| 1 | These chromosomes are metacentric, hence appear X shaped. | These chromosomes are acrocentric, hence appear Y shaped |
| 2 | They are longer than ‘Y’ chromosomes | They are shorter than ‘X’ chromosomes |
| 3 | It contains large amount of euchromatin and small amount of heterochromatin. | It contains large amount of heterochromatin and small amount of euchromatin. |
| 4 | Found in both male and females. | Found only in males. |
| 5 | Non-homologous part shows more genes than Y chromosome. |
Non-homologous part contains few genes as compared to X chromosome. |
| 6 | X - linked genes are present on X chromosome. | Y- linked genes (Holandric genes) are present on Y chromosome. |
| 7 | Genes present on X chromosome show criss-cross inheritance. |
Genes present on Y chromosome show straight inheritance |
APPEARS IN
संबंधित प्रश्न
A male honeybee has 16 chromosomes whereas its female has 32 chromosomes. Give one reason.
Classify the chromosomes on the basis of position of centromere.
Genes G S L H are located on the same chromosome. The recombination percentage is between L and G is 15%, S and L is 50%, H and S are 20%. The correct order of genes is
If the haploid number in a cell is 18. The double monosomic and trisomic number will be
If you cross dominant genotype PV/PV male Drosophila with double recessive female and obtain F1 hybrid. Now you cross F1 male with double recessive female.
What is the possible genotype in the F2 generation?
Identify the term that represents the degree of repetition of the primary basic number of chromosomes in a cell.
Extra nuclear chromosomes occur in ______.
In a certain taxon of insects some have 17 chromosomes and the others have 18 chromosomes. The 17 and 18 chromosome-bearing organisms are ______.
Two or more independent genes present on different chromosomes which determine nearly same phenotype are called ______.
A couple has two daughters. What is the probability that the third child will also be a female?
