TLS Online TPP Program

#Question id: 4980


If an increase in dicynodont species diversity (i.e., number of species) occurred soon after the Permian extinction, and if it occurred for the same general reason usually given for the increase in mammalian diversity following the Cretaceous extinction, then it should be attributed to

#Unit 11. Evolution and Behavior
  1. an innovation among the dicynodonts that allowed them to fill brand new niches.

  2. the availability of previously occupied niches.

  3. the extinction of the dinosaurs (except the birds).

  4. the evolution of humans.

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TLS Online TPP Program

#Question id: 5713

#Unit 8. Inheritance Biology

Following some statement are correct?

A) Translocation may be associated with movement of genetic material within the same chromosome

B) A person that is heterozygous for translocation may result in non viability in their zygote

C)  A person that is heterozygous for inversion may result in non viability in their recombinant zygote

D) A person that is heterozygous for translocation and lack of crossing over within translocated area result in all viable gametes

TLS Online TPP Program

#Question id: 5712

#Unit 8. Inheritance Biology

In each of the following cases, determine the consequences of a single crossover within the inverted region of a pair of homologous chromosomes with the gene order A B C D in one chromosome and a c b d in the other. There is a two situation of centromere for that gene. 

(A) Centromere is not included within the inversion.

(B) Centromere is included within the inversion

Following consequence are resulting are

I - The crossover chromatids consist of a dicentric and an acentric

II- One Cross over product is duplicated for the terminal region contain in A and deficient for the terminal region containing D

III- Both cross over products is monocentric

Following is correct combination for consequence?

TLS Online TPP Program

#Question id: 5711

#Unit 8. Inheritance Biology

Which of the following is results of Crossing over?

TLS Online TPP Program

#Question id: 5710

#Unit 8. Inheritance Biology

This cytological analysis, chromosome (A) represents the normal condition and the centromere position. Assume that only one structural chromosome aberration occurs in the other chromosomes

TLS Online TPP Program

#Question id: 5696

#Unit 8. Inheritance Biology

Abnormality during egg formation as a nondisjuction in anaphase I of single set of chromosome, but spermatogenesis is normal will produced resulting progeny would be

TLS Online TPP Program

#Question id: 5693

#Unit 8. Inheritance Biology

Type of nondisjunction leads to regions of tissue with different chromosome constitutions, a condition known as mosaicism is due to