TLS Online TPP Program

#Question id: 1120


A mutation that knocks out the GTPase activity of a G protein would have what effect on a cell?

#Section 3: Genetics, Cellular and Molecular Biology
  1. The concentration of available GTP would decrease.

  2. The number of G proteins in the cell would increase.

  3. The G protein would be inactivated by a G protein-coupled receptor/signal molecule complex.

  4. The G protein would always be active.

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TLS Online TPP Program

#Question id: 4741

#Section 3: Genetics, Cellular and Molecular Biology

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?

TLS Online TPP Program

#Question id: 4745

#Section 3: Genetics, Cellular and Molecular Biology

In some goats, the presence of horns is produced by an autosomal gene that is dominant in males and recessive in females. A horned female is crossed with a hornless male. The F1 offspring are intercrossed to produce the F2. What proportion of the F2 offspring will have horns?

TLS Online TPP Program

#Question id: 4746

#Section 3: Genetics, Cellular and Molecular Biology

Two independent pure line varieties having deep red and brown phenotype in their seed coat were cross, the all f1 progeny is deep red. The F2 progeny obtain from selfing show deep red and brown in ratio of 15:1. Which of the following observation is correct?

TLS Online TPP Program

#Question id: 4747

#Section 3: Genetics, Cellular and Molecular Biology

How does incomplete dominance differ from incomplete penetrance?

TLS Online TPP Program

#Question id: 4748

#Section 3: Genetics, Cellular and Molecular Biology

Eye color in Drosophila present on X chromosome, Red eye color is dominant over white eye color. There is non disjunction in Meiosis I in female and normal meiosis in male. Female is white eye color was cross with red eye male. What will be expected phenotype in their progeny?

TLS Online TPP Program

#Question id: 4749

#Section 3: Genetics, Cellular and Molecular Biology

A normal woman, whose father was Hemophilic and color blind is married to a colorblind, nonhemophilic man. What will be probability of colorblind, hemophilic daughter?