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Flashcards in Genetics Review Deck (19):
1

how many autosomes do we have?

22 sets

2

how many sex chromosomes do we have?

1 set

3

how amino acids does the body contain?

20

4

what is the enzyme responsible for replicating DNA?

DNA polymerase

5

when do boys sperm reach meiosis II production?

puberty

6

when do girls eggs reach meiosis II production?

all eggs are formed in infancy but finish m II after puberty
-all eggs will be impacted with teratogen exposure
-eggs age more

7

what are exons?

places where the information is held

8

what are introns?

places where information doesn't code for any proteins

9

what is a germinal mutation?

genetic change occurring during formation of an egg or a sperm

10

what is a somatic mutation?

when the change occurs after conception

11

what is nondisjunction?

failure of chromosomes pairs to separate
-can happen in meisosi 1 or 2

12

what is an aneuploid cell?

a cell that does not contain the usual multiple of 23 chromosomes (may be more or less)

13

what is a translocation?

relocation of chromosome arm to another place

14

what is an unbalanced abnormality?

there is a gain or loss of genetic material

15

what is a balanced abnormality?

there is no change in amount of genetic material but a dislocation of material

16

what is the prognosis of a fetus with monosomy?

lethal, not compatible with life

17

what are the most frequent locations of trisomy?

13,18,21
-16 often aborted fetus

18

which are the pyrimidines?

cytosine
thymine

19

which are the purines?

adenine
guanine

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