Which chromosome is abnormal or carries a genetic mutation? a. 13th pair b. 21st pair c. 23rd pair d. 18th pair

The correct answer is: B. 21st pair.

We can see on the picture that there are three 21st chromosomes instead of normal two. So, it means that the patient has trisomy 21 or Down’s syndrome.

Down syndrome is one of the most common genetic disorders caused by abnormal cell division involving chromosome 21 (failure of the 21st chromosome to separate during the cell division). Symptoms of people with Down syndrome include delayed physical growth, characteristic facial features (Mongoloid face), potential intellectual disability.

the supermassive black hole is in the middle of the galaxy.

c: warm water flows from the western tropical pacific toward south america. that should be the right answer! hope it .