« previous next »

Author Question: A couple has a child with Down syndrome. The mother is 39 years old at the time (Read 1153 times)

Hungry!

  • Hero Member
  • *****
  • Posts: 1,071
on: Jun 21, 2013
A couple has a child with Down syndrome. The mother is 39 years old at the time of delivery. Which of the following is the most probable cause of the child's condition?
A) The woman inherited this tendency from her parents.
B) One member of the couple carried a translocation.
C) One member of the couple underwent nondisjunction in somatic cell production.
D) One member of the couple underwent nondisjunction in gamete production.
E) The mother had a chromosomal duplication.


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?

Fungal nail infections account for up to 30% of all skin infections. They affect 5% of the general population—mostly people over the age of 70.

Did you know?

Symptoms of kidney problems include a loss of appetite, back pain (which may be sudden and intense), chills, abdominal pain, fluid retention, nausea, the urge to urinate, vomiting, and fever.

Did you know?

Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.

Did you know?

Interferon was scarce and expensive until 1980, when the interferon gene was inserted into bacteria using recombinant DNA technology, allowing for mass cultivation and purification from bacterial cultures.

Did you know?

Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.

Changes in Earth's atmospheric carbon dioxide levels over geological time. Changes in Earth's atmospheric carbon dioxide levels over geological time.
A child having a seizure is gently assisted to the floor and placed in a sidelying position. A child having a seizure is gently assisted to the floor and placed in a sidelying position.
Physical features of Sjögren's syndrome. Source: Ways Sjogren's Syndrome May Affect the ... Physical features of Sjögren's syndrome. Source: Ways Sjogren's Syndrome May Affect the ...
J.S. Ondara - J.S. Ondara - "Mother Christmas"
Marasmus The emaciated appearance of this child is a sign (and symptom) of marasmus Marasmus The emaciated appearance of this child is a sign (and symptom) of marasmus
Magnitude of Geologic Time Magnitude of Geologic Time
Video: Introduction to Diabetes

For a complete list of videos, visit our video library