TLS Online TPP Program

#Question id: 15594


In an unordered tetrad with the parental ditype:

#Unit 8. Inheritance Biology
  1. all spores have the same genotype.
  2. all spores have the same genotype of one of the parental strains
  3. all four spores have different genotypes.
  4. all spores are diploid. In a parental ditype, the spores are of both parental types in a 2:2 ratio.
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TLS Online TPP Program

#Question id: 5004

#Unit 11. Evolution and Behavior

Pax-6 usually causes the production of a type of light-receptor pigments. In vertebrate eyes, though, a different gene (the rh gene family) is responsible for the light-receptor pigments of the retina. The rh gene, like Pax-6, is ancient. In the marine ragworm, for example, the rh gene causes production of c-opsin, which helps regulate the wormʹs biological clock. Which of these most likely accounts for vertebrate vision?

TLS Online TPP Program

#Question id: 4884

#Unit 8. Inheritance Biology

True breeding brown dogs with genotype aabb were cross to true breeding white dogs with genotype AABB. All F1 offspring having white phenotype were allowed to intercross to produce F2 progeny as following number –

A- - - 118 white,

aa B- 32 black

aa bb 10 brown

A Male Dog with AaBb genotype was cross with female dog with aabb genotype. What is probability of Black phenotype among their offspring if A gene link B gene at 10 map unit at cis configuration?

TLS Online TPP Program

#Question id: 14084

#Unit 1. Molecules and their Interaction Relevant to Biology

In DNA helix the angle at which the two sugars protrude from the base pairs (i.e., the angle between the glycosidic bonds) are 
A. 120
B. 36 
C. 240
D. 20
Choose the correct option?

TLS Online TPP Program

#Question id: 12985

#Unit 10. Ecological Principles

An ecological footprint is a construct that is useful

TLS Online TPP Program

#Question id: 5767

#Unit 8. Inheritance Biology

 An enzyme that repairs thymine dimers in visible light in E. coli