TLS Online TPP Program

#Question id: 4319


Why are BRCA1 and BRCA2 considered to be tumor-suppressor genes?

#Unit 3. Fundamental Processes
  1. Their normal products participate in repair of DNA damage.

  2. The mutant forms of either one of these prevent breast cancer.

  3. The normal genes make estrogen receptors.

  4. They block penetration of breast cells by chemical carcinogens.

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TLS Online TPP Program

#Question id: 3547

#Unit 8. Inheritance Biology

Ram and Nidhi are apparently normal, but their daughter was born with alkaptonuria, an inherited metabolic disorder. If alkaptonuria is like most human hereditary disorders, the probability of their next child being born with alkaptonuria is

TLS Online TPP Program

#Question id: 3548

#Unit 8. Inheritance Biology

 In a cross between two heterozygotes (Aa), the F2 generation will be

TLS Online TPP Program

#Question id: 3549

#Unit 8. Inheritance Biology

When a plant of chromosomal type aa pollinates plant of type AA, what is the chromosome constitution of embryo and endosperm is expected in the resulting seeds

TLS Online TPP Program

#Question id: 3550

#Unit 8. Inheritance Biology

A man with type A blood and colorblindness marries a woman with type A blood and normal. Their first female child has type O blood and colorblindness. What is the probability of next female child will be A blood group and colorblindness?

TLS Online TPP Program

#Question id: 3551

#Unit 8. Inheritance Biology

In angiosperm plant, assume that the male parent has an AA Bb genotype, and that the female parent has an aa BB genotype. What is genotype in endosperm nucleus, after reproduction between these two plants?

TLS Online TPP Program

#Question id: 3552

#Unit 8. Inheritance Biology

In corn, three dominant alleles, called A, C, and R, must be present to produce colored seeds. Which of the following genotype would produce 25 % color seeded plant, When cross with Aaccrr?