Give the dihybrid ratio. Name and state the law which explains the same.
Dihybrid ratio: 9:3:3:1
Law of independent assortment explains it.
Law of independent assortment states that in a dihybrid cross, the distribution of the
members of one pair into the gametes is independent of the distribution of the other
pair.
Account for the following briefly:
(iv) Herbaceous plants growing in well-watered soils are found to wilt on a hot day.
Mention the difference between mitosis and meiosis with reference to
1. Number of daughter cells formed at the end of the division.
2. The chromosome number of the daughter cells formed.
Draw a diagram of the nucleus of a cell, having chromosome number 6, as it would appear in the metaphase stage of mitosis and label the following parts in the diagram:
1. Aster
2. Achromatic spindle
3. Chromatid
4. Centromere