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TLS Online TPP Program

#Question id: 5807

Which of the following would be an example of a germline mutation?

#Unit 8. Inheritance Biology

  1. Exposure to excessive UV radiation causes changes in the DNA of a skin cell, leading to basal cell carcinoma (skin cancer).

  2. In a very early human embryo, a mistake in mitosis causes loss of a Y chromosome in one daughter cell. The resulting child is a fertile male who is chromosomally partially male (XY) and partially female with Turner's syndrome (XO).

  3. A man with normal chromosomes has a hip X-ray without a protective shield. Ten months later, his wife gives birth to a child with a chromosomal deletion.

  4. An embryo missing one copy of the third chromosome is miscarried very early in pregnancy.

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TLS Online TPP Program

#Question id: 3382

#Unit 9. Evolution & Diversity of Life Forms

Researchers in the Netherlands studied the effects of parental care giving in European kestrels over 5 years. The researchers transferred chicks among nests to produce reduced broods (three or four chicks), normal broods (five or six), and enlarged broods (seven or eight). They then measured the percentage of male and female parent birds that survived the following winter. (Both males and females provide care for chicks.) Which of the following is a conclusion that can be drawn from this graph?
TLS Online TPP Program

#Question id: 3383

#Unit 9. Evolution & Diversity of Life Forms

What does the study of analogous organ tell us about evolution?

A. This is the example of convergent evolution, occurred due to different group of organisms inhabiting same environments

B- Evolutionary change follow common pathway in two or more distinct species

C- Different organism get adopted to one environment

D- Similar group of organisms with mutations and variations getting naturally selected in different environments 
TLS Online TPP Program

#Question id: 3384

#Unit 9. Evolution & Diversity of Life Forms

In a sample from an African population, the frequency of blood group allele IA, IB and IO were 0.30, 0.20 and 0.50 respectively. What is expected number of homozygous and heterozygous respectively when population size 1200?
TLS Online TPP Program

#Question id: 3385

#Unit 9. Evolution & Diversity of Life Forms

What is the effect of inbreeding; in a population assume no other evolutionary forces are present?

a. Allelic frequencies change.

b. There will be more heterozygotes than predicted by the Hardy-Weinberg law.

c. There will be fewer heterozygotes than predicted by the Hardy-Weinberg law.

d. Genotypic frequencies will equal those predicted by the Hardy-Weinberg law.
TLS Online TPP Program

#Question id: 3386

#Unit 9. Evolution & Diversity of Life Forms

Which statement represents the best explanation for the observation that the nuclear DNA of wolves and domestic dogs has a very high degree of homology?

a) Dogs and wolves have very similar morphologies.

b) Convergent evolution has occurred.

c) Dogs and wolves not shared more recent common ancestor

d) Dogs and wolves shared a more recent common ancestor
TLS Online TPP Program

#Question id: 3387

#Unit 9. Evolution & Diversity of Life Forms

Observe the following hypothetical populations Which of these populations, if any, is in Hardy-Weinberg equilibrium