The F2 progeny from a particular cross exhibit a modified dihybrid ratio of 9 : 7 (instead of 9 : 3 : 3 : 1). What phenotypic ratio would be expected from a testcross of the F1?

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#Question id: 1851

#Section 2: General Biology

Which of the following is a feature of a Salmonella-based vaccine expressing antigens from other infectious agents?

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#Question id: 27056

#Section 4: Fundamentals of Biological Engineering

15 J is the latent heat for melting of ice, what is the heat of transition from 0oC ice to 15oC water if heat of transition from 0oC water to 15oC water is 10 J?

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#Question id: 3611

#Section 3: Genetics, Cellular and Molecular Biology

ABO blood group system is due to

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#Question id: 4752

#Section 3: Genetics, Cellular and Molecular Biology

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: 14256

#Section 5: Bioprocess Engineering and Process Biotechnology

Hybridoma cells immobilized on surfaces of Sephadex beads are used in a packed column for production of monoclonoal antibodies (Mab). Hybridoma concentration is approximately X = 5 g/l in the bed. The flow rate of the synthetic medium and glucose concentration are Q = 2 l/h and S0 = 40 g/l, respectively. The rate constant for Mab formation is k = 1 gX/l-d. Assume that there are no diffusion limitations and glucose is the rate limiting nutrient.  If Yp/s is 4 mg Mab/g glu, determine productivity of the system? __________________