Biology

8 April, 22:32

Down syndrome is most often the result of an extra copy of chromosome 21, a condition known as trisomy 21. The extra chromosome originates from the failure of homologous pairs to separate during gamete formation in one parent. Subsequent fertilization results in a zygote with three copies of chromosome 21. Which term best classifies the event in the passage above that leads to trisomy 21?

A nondisjunction

B insertion

C crossing over

D translocation

+1

Answers (1)

Know the Answer?

Not Sure About the Answer?

Find an answer to your question 👍 “Down syndrome is most often the result of an extra copy of chromosome 21, a condition known as trisomy 21. The extra chromosome originates ...” in 📗 Biology if the answers seem to be not correct or there’s no answer. Try a smart search to find answers to similar questions.

Search for Other Answers

You Might be Interested in

What is a function of the ground tissue of a root

Watch the animation, DNA Replication. After DNA replication, how many double-stranded DNA molecules exist?

Humans have 23 chromosomes true or false?

The Afrikaners are an example of a founder effect that occurs when a new colony is started by a few members of the original population and the random decrease in genetic variation is an example of? A. Genetic drift B. Natural Selection C.

What is one way that calcitonin and parathyroid hormone maintain homeostasis?

New Questions in Biology

Is cellulose a fat, carbohydrate or protien

I mineral must be formed by a manufactured process to be considered a mineral. T or F

The prediction that alcohol slows reaction time is

If you shine a bright light directly in a person's eye, the pupil of the eye will reflexively constrict. using pavlov's terminology, the bright light would be termed the ___, and the pupil constricting would be termed the ___.

Which people do European landowners need to work on their colonial planatations after many of the native American died?