3.3.5 to 3.3.6

Question 1

karyogram

Answer 1

an image of a cell’s homologous chromosome pairs ordered by decreasing size

Question 2

karyotype

Answer 2

the complete set of chromosomes of an individual

karyotyping-used to check no. and type of chromosomes

Question 3

ways to obtain fetal material for tests

Answer 3

amnio centesis and chrionic villus sampling (CVS)

Question 4

chorion

Answer 4

membrane part of the placenta contains many cells within villi

Question 5

newer technology

Answer 5

determines fetal karyotype using minimal amounts of fetal DNA found at maternal blood

Question 6

non-disjunction

Answer 6

when homologous chromosomes fail to separate at anaphase I or II or in anaphase mitosis

Question 7

trisomy

Answer 7

having an extra copy of a single chromosome (2n+1)

Question 8

down syndrome (trisomy 21)

Answer 8

result of disjunction

Question 9

triploidy

Answer 9

having 3 copies of every chromosome (3n)

Question 10

monosomy

Answer 10

having 1 chromosome of a homologous pair

Question 11

what is the only way for a human to survive monomy?

Answer 11

having a single x chromosome fort he sex chromosome