PATHOLOGY

PATHOLOGY MCQ

GENETICS AND DISEASE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What percentage of genes are same in all human beings?
A
90%
B
99%
C
99.9%
D
99.99%
Explanation: 

Detailed explanation-1: -Its findings suggested that all humans are 99.9% genetically identical and only 0.1% of genetic variations are responsible for the phenotypic differences, such as physical traits (eg, height, intelligence, hair, and eye color), disease susceptibility, and drug responses, among individuals in populations.

Detailed explanation-2: -Humans are 99.9% identical on a genetic level. The 0.1% difference is caused by insertions, deletions and substitutions in the DNA sequence. These substitutions are known as Single Nucleotide Polymorphisms (SNPs). They occur about every 1000 base pairs.

Detailed explanation-3: -It’s often said that humans are 99.9% identical. and what makes us unique is a measly 0.1% of our genome. This may seem insignificant. But what these declarations fail to point out is that the human genome is made up of three billion base pairs-which means 0.1% is still equal to three million base pairs.

Detailed explanation-4: -Chimpanzees are the closest living relatives of humans and share nearly 99 percent of our DNA. Efforts to identify those regions of the human genome that have changed the most since chimps and humans diverged from a common ancestor have helped pinpoint the DNA sequences that make us human.

There is 1 question to complete.