The recessive mutant allele that causes cystic fibrosis is much more frequent in Caucasians population than in other world populations. Some scientists believe heterozygotes must have had a survival advantage during plagues such as cholera that occasionally swept through this population. What concept does this illustrate?

TLS Online TPP Program

#Question id: 12023

#Unit 7. System Physiology – Animal

The absorption of fats differs from that of carbohydrates in that ________.

TLS Online TPP Program

#Question id: 12820

#General Aptitude

The length of a room floor exceeds its breadth by 20 m. The area of the floor remains unaltered when the length is decreased by 10 m but the breadth is increased by 5 m. The area of the floor (in square metres) is :

TLS Online TPP Program

#Question id: 15831

#Unit 8. Inheritance Biology

Your friends Ben and Jane are contemplating having children and seek your genetic counsel. Ben and Jane are unrelated, but both have younger brothers with the same, extremely rare genetic trait. (In fact, Ben and Jane met at a support group meeting for children and families of children with this rare disorder.) Ben’s parents and Jane’s parents are all unaffected.        

 Assume that the trait is X-linked recessive with complete penetrance. What is the probability that Ben and Jane’s first child will be affected? What is the probability that the first child will be a carrier? 

TLS Online TPP Program

#Question id: 18712

#Unit 13. Methods in Biology

which of the following are two major functions of RE

TLS Online TPP Program

#Question id: 19751

#Unit 3. Fundamental Processes

The processing and repair of DSBs can lead to