16 - CHANGES IN CHROMOSOME NUMBER

Question 1

how did octoploid strawberries arise

Answer 1

Question 2

how did the rutabaga plant originate

Answer 2

this happened in the wild over long periods of time

Question 3

what happened when a scientist tried to cross a radish and a cabbage

Answer 3

Question 4

how did the hybrid become fertile

Answer 4

Question 5

what happens when you cross the allopolyploid back with one of its parent species

Answer 5

Question 6

why does the rutabaga have 38 chromosomes and why is it 2n

Answer 6

Question 7

reminder of what is euploid vs aneuploid

Answer 7

Question 8

some examples of viable trisomies and viable monosomies

Answer 8

monosomy = 2n-1

Question 9

how does aneuploidy affect somatic cells

Answer 9

affects the balance of gene dosage in a cell
human trisomy 21 is viable
only trisomy to routinely survive to adulthood
that means it has the fewest genes sensitive to gene dosage

Question 10

how was the trisomy of the jimsonweed investigated

Answer 10

Question 11

what are the possible meiotic products of trisomy

Answer 11

Question 12

how does aneuploidy arise

Answer 12

Question 13

reminder of normal meiosis in diploids

Answer 13

Question 14

what does non disjunction during meiosis 1 lead to

Answer 14

Question 15

how does nondisjunction in meiosis 1 reflect a failure in pairing/crossover

Answer 15

Question 16

what does non disjunction during meiosis 2 lead to

Answer 16