In about 95% of Down syndrome cases, the extra 21st chromosome exists because
A) of a duplication error during mitosis.
B) of injury that occurs during amniocentesis.
C) the zygote becomes separated and divides into two zygotes.
D) the 21st pair of chromosomes did not separate properly when the egg was formed.
D) the 21st pair of chromosomes did not separate properly when the egg was formed.
You might also like to view...
Which thinker suggested that children are born a "tabula rasa?"
a. Jean-Jacques Rousseau b. John Locke c. Alfred Binet d. Sigmund Freud
Someone who is shown a picture of Babe Ruth and then asked to complete the word ball will be more likely to respond "baseball" than "football" or "basketball," illustrating the effects of:
A) state-dependent retrieval. B) conceptual priming. C) perceptual priming. D) encoding specificity.
"I'm good when I get praised, and I'm bad when I get spanked.". This statement represents ____ in Kohlberg's model of moral reasoning
a. the "good boy" or "good girl" orientation b. naive hedonism c. the punishment and obedience orientation d. social-order-maintaining morality
Testosterone levels in males and females are related to incidence of masturbation
Indicate whether the statement is true or false