Chapter 7: Sex Determination and Sex Chromosomes

EAR OF CORN; BANANA carpels, APPLE and PEAR shape
ADD ZZ/ZW
Lygaeus_kalmi = Small Milkweed Bug
HinT male factors on autosomes Drosophila
1=E	2=B	3=E	4=A	5=B
6=E	7=A	8=A	9=D	10=B
11=D	12=B	13=B	14=E	15=C

1=...conditions	2=...NONE	3=Y, X		4=F		5=XYY taller
6=..TDF		7=...females?	8=Homologous	9=Y swimmers	10="doses"
11=T		12=X, sets	13=Haploid	14=..endosperm	15=.Barr
16=48		17=Extrachromos	18=Fem mosaics X-linked genes	19=must
  1. Orange 10 carpels
  2. Sex symbols: shield & spear=iron/Mars, mirror=copper/Venus
  3. C elegans (free-living) transparent; polyploids: tetraploid/triploid; heartworm is Nematoda; John Sulston Nobel 2002
  4. Read p. 172, XYY condition: above-average height
  5. High male primary sex ratio: Y chromosome smaller; sperm more motile