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Question
Distinguish between X andY chromosomes. (Mention any 'two' points.)
Solution
| 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 |
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