An X-linked recessive gene produces red-green color blindness in humans. A woman with normal color vision whose father was color-blind marries a color-blind man. What is the probability that their son will be color-blind?

#Question id: 1101

#Unit 4. Cell Communication and Cell Signaling

The activity of adenylyl cyclase is essentially the opposite of which of the following enzymes?

#Question id: 3632

#Unit 8. Inheritance Biology

geneticist is working with a new bacteriophage called phage Y3 that infects E. coli. He has isolated eight mutant phages that fail to produce plaques when grown on E. coli strain K. To determine whether these mutations occur at the same functional gene, he simultaneously infects E. coli K cells with paired combinations of the mutants and looks to see whether plaques are formed. He obtains the following results. (A plussign means that plaques were formed on E. coli K; a minussign means that no plaques were formed on E. coli K.)

How many cistron belong to these mutation?

#Question id: 4781

#Unit 8. Inheritance Biology

Two non allelic gene P and Q governed  Glume color in sorghum.

P= blakish purple          

Q = raddish purple (dependent over P gene )

If heterozygous Raddish purple were cross with homozygous brown color .What are phenotypic ratio of  progeny?

#Question id: 5839

#Unit 8. Inheritance Biology

During recombination in E. coli, ________ recognize(s) regions of sequence similarity and promote(s) strand invasion, while ________ bind(s) to a Holliday junction promoting strand migration.

#Question id: 815

#Unit 1. Molecules and their Interaction Relevant to Biology

The cis conformation shows Cα atoms are on the same side of the peptide bond, is ∼8 kJ mol−1 less stable than the trans conformation. Why?