BA KIEU BAT CAP NST O THE TU BOI 7 Figure 15-7 Three different meiotic pairing possibilities in tetraploids.. The four homologous chromosomes may pair as two bivalents or a quadrivale
Trang 2BA KIEU BAT CAP NST O THE
TU BOI
7
Figure 15-7 Three different
meiotic pairing possibilities in tetraploids The four homologous chromosomes may pair as two bivalents or a quadrivalent, and each can yield functional gametes A third possibility, a trivalent plus a univalent, yields
|
Two bivalents One quadrivalent Univalent + Trivalent nonfunctional gametes
Trang 3uw
DOT BIEN BA BOI VA QUA TRINH
HINH THANH LOAI
Kohtrabi Brussels sprouts
7 2 ⁄
8 carinata,
2n=34
Abyssinian mustard
8 juncea, 8& campestris,
Figure 15-9
Three species of
Brassica (blue
2n = 16 «o n=8 2n=36 n=10 2n=20 boxes) and their
Black mustard + ———* }) Leaf mustard <——— | Chinese cabbage allopolyploids (pink
+ ẹ Turnip boxes), showing the
, \ + ` HN ere importance of
allopolyploidy in the production of new species
Trang 4
Nho wong bol va nho da bot
Trang 5Inn Got pien Gi Dol
Co’ cne phat s
Trang 6Ba kiểu phân lí NST ở thế 3 nhiễm er
A
1 al ol 3 @ aa DD
A 2a =
al
Se a eg
a a
3 <4
c?
3 oa >>
Figure 15-15 Genotypes of the meiotic products of an A/a
trisomic The three segregations shown are equally likely
Trang 7
\ \ \ yy 4 | a j
Trang 8Diplo Immature pollen Monoploid Monoploid Monoploid
