Red-green color blindness is caused by a sex-linked recessive allele. A color-blind man marries a woman with normal vision whose father was color-blind. What is the probability that they will have a color-blind daughter? What is the probability that their first son will be color-blind respectively?

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#Question id: 2659

#XL - T Zoology

The correct option regarding the lac operon in E.coli from the following is

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#Question id: 2660

#XL - T Zoology

In the lactose operon, the molecule that causes the repressor to fall off the promoter is which of the following?

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#Question id: 2661

#XL - T Zoology

In the histidine operon, if the codons coding for histidine were removed, which of the following would you predict would happen?

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#Question id: 2662

#XL - T Zoology

In the tryptophan operon, tryptophan serves as ________________.

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#Question id: 2663

#XL - T Zoology

A ______________ is a collection of clones that, among themselves, contain all the DNA sequences of the organism.

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#Question id: 2664

#XL - T Zoology

Which of the following is an example of positive gene regulation?