Advertisements
Advertisements
Question
Distinguish between X andY chromosomes. (Mention any 'two' points.)
Advertisements
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 |
APPEARS IN
RELATED QUESTIONS
Define the term ‘genome’.
Explain the types of chromosomes on the basis of position of centromere.
Choose the correct options of the following question:
Study the given monohybrid cross:
A test cross for this Fj will be:
Answer the following question.
Compare in any three ways the chromosomal theory of inheritance as proposed by Sutton and Bovery with that of experimental results on pea plant presented by Mendel.
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?
Mention the name of man-made cereal. How it is formed?
A plant having the genotype AABbCC will produce ______ kinds of gametes.
Extranuclear inheritance is a consequence of presence of genes in ______.
Which three scientists independently rediscovered Mendel’s work?
Which of the following sentences are correct?
1. The offspring exhibit only parental combinations due to incomplete linkage
2. The linked genes exhibit some crossing over in complete linkage
3. The separation of two linked genes are possible in incomplete linkage
4. Crossing over is absent in complete linkage
