TLS Online TPP Program

#Question id: 8897


Which of the following statements would be least acceptable to most zoologists?

#Unit 9. Diversity of Life Forms
  1. The extant cephalochordates (lancelets) are contemporaries, not ancestors, of vertebrates.
  2. The first fossils resembling cephalochordates appeared in the fossil record around 550 million years ago.
  3. Recent work in molecular systematics supports the hypothesis that cephalochordates are the most recent common ancestor of all vertebrates.
  4. The extant cephalochordates are the immediate ancestors of the fishes.
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TLS Online TPP Program

#Question id: 4751

#Unit 8. Inheritance Biology

In the following example, 3 independently assorting genes are known to govern coat color in mice. The genotype of few of the coat colors is given below:

Agouti: A-B-C- Black: aa B-C - Albino: -- -- cc

What will be the expected frequency of abino, in progeny from crosses of  AaBbCc with albino of the genotype aabbcc?

TLS Online TPP Program

#Question id: 4752

#Unit 8. Inheritance 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?

TLS Online TPP Program

#Question id: 4753

#Unit 8. Inheritance Biology

Pattern baldness in humans is a sex-influenced trait that is autosomes dominant in males and recessive in females. What is genotype of both parents with normal hair had one son with pattern baldness and another son is normal hair?

TLS Online TPP Program

#Question id: 4754

#Unit 8. Inheritance Biology

Allele A is epistatic to allele B. Which of the following statement are incorrect?

TLS Online TPP Program

#Question id: 4755

#Unit 8. Inheritance Biology

When two albino snails were crossed, all of the F1 were pigmented. All F1 intercross would results

TLS Online TPP Program

#Question id: 4756

#Unit 8. Inheritance Biology

In summer squash, white colour fruit (W) is dominant over yellow colour (w) and disc-shaped phenotype (D) is dominant over sphere-shaped phenotype (d). Determine the genotype of the parents gives 3/8 white, sphere, 3/8 white, Disk, 1/8 Yellow, Disk and 1/8 Yellow, Sphere?