Interspecific crosses are rare in nature and intergeneric crosses are almost unknown. Why?

Tjio and Levan's contribution is very significant because they

Which of the following organisms has the highest number of chromosomes?

Presence of a single allele of a character in a diploid organism is known as $:$

With the help of an example,differentiate between incomplete dominance and co-dominance.

In certain plant species,red flower colour is incompletely dominant to white flower colour (the heterozygote is pink) and tall stems are completely dominant to dwarf stems. If a tall pink plant $(TtRr)$ is crossed with a tall white plant $(TTrr),$ which one of the following types of plants would be produced in the offspring?