« previous next »

Author Question: What is the source of the extra chromosome 21 in an individual with Down syndrom (Read 430 times)

Hungry!

  • Hero Member
  • *****
  • Posts: 1,071
on: Jun 21, 2013
What is the source of the extra chromosome 21 in an individual with Down syndrome?
A) nondisjunction in the mother only
B) nondisjunction in the father only
C) duplication of the chromosome
D) nondisjunction or translocation in either parent
E) It is impossible to detect with current technology.


camila

  • Hero Member
  • *****
  • Posts: 705
Reply #1 on: Jun 22, 2013
100% it's D, don't forget to gimmi a thumbs up :D


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question

Hungry!

  • Hero Member
  • *****
  • Posts: 1,071
Reply #2 on: Aug 13, 2013
Thanks so much, you were right on.


« previous next »
 

Did you know?

During pregnancy, a woman is more likely to experience bleeding gums and nosebleeds caused by hormonal changes that increase blood flow to the mouth and nose.

Did you know?

Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.

Did you know?

In 2012, nearly 24 milliion Americans, aged 12 and older, had abused an illicit drug, according to the National Institute on Drug Abuse (NIDA).

Did you know?

Cucumber slices relieve headaches by tightening blood vessels, reducing blood flow to the area, and relieving pressure.

Did you know?

Ether was used widely for surgeries but became less popular because of its flammability and its tendency to cause vomiting. In England, it was quickly replaced by chloroform, but this agent caused many deaths and lost popularity.

A molecular model showing chromosome territories in the cell nucleus of humans A molecular model showing chromosome territories in the cell nucleus of humans
Types of changes in chromosome structure Types of changes in chromosome structure
Unique markings identify individual humpback whales. Unique markings identify individual humpback whales.
Milk is essential source of calcium Milk is essential source of calcium
The steps in the process of creating a karyotype for chromosome analysis. The steps in the process of creating a karyotype for chromosome analysis.
Opener Chromosome territories in a chicken cell nucleus Opener Chromosome territories in a chicken cell nucleus
Video: Transferring genes into plants Animation

For a complete list of videos, visit our video library