Human Health and Disease — BIOLOGY STD 12 Science — Question

Repressors

Sketch and label – depolarization and repolarization along nerve.

Name the following: Pre-mating isolating mechanisms.

In a dihybrid cross carried out by T.H. Morgan in Drosophila, the F, ratio deviated from that of Mendel's dihybrid F, ratio. Give a reason.
Or
Why do certain genes tend to be inherited together in a cell at the time of cell division?

Or
If the frequency of a parental form is higher than 25% in a dihybrid test cross, what does that indicate about the two genes involved?

What is Red Data Book ?

Name the following: A precursor from which GA and ABA are synthesized.

Name two plants other than coca plant that have hallucinogenic properties.

A colourblind boy is born to a couple with normal colour vision. Write the genotypes of the parents.

Name the Following : The microbes used in fermentation of dhokla.