Nondisjunction

Question 1

what is nonjusdunction?
-what phase of meiosis does it occur in
-why won’t some cells not function properly
-in humans, how many chromosomes in gametes, resulting in how many in the zygote
-whats it called when 1 chromosome is lost
-whats it called when 1 chromosome is gained

Answer 1

chromosomes or chromatids don’t seperate proerply during meiosis
-anaphase 1 or 2
-they lack or have too much information
-22 or 24 which results in 45 or 47 in the zygote
-monosomy
-trisomy

Question 2

Down syndrome
In M or F
-Chromosomes affected
-how many total

Answer 2

-M and F
-trisonomy 21
(2n+1)= 47 chromosomes

Question 3

Chronic Villus sampling
-which cells are collected from where?
-when can it be preformed

Answer 3

-embryonic cells are collected from the outer membrane/chorion
-8 weeks

Question 4

Ammniocentesis
-what is used to draw fluid from where
-the _________ fluid contains what?

Answer 4

-syringe draws fluid from the fetus
-amniotic fluid contains cells of the fetus which can be tested