A man with normal vision whose father was colourblind marries with women whose father was also colourblind. Suppose their first child is daughter then what are the chances of this child to be colourblind?
Gamete mother cells of the chromosome 44 + XY suffers from non-disjunction at first meiotic division. Which of the following set of gametes would result?
flowers only during long days and flowers only during short days, if raised in the laboratory under different photoperiods, they can be induced to flower at the same time and can be cross fertilized to produce self-fertile offspring. What is the best reason for considering N. sylvestris and N. tobaccum to be separate species?