Wallart
Wasps; heredity of sex in
Weapons, organs used as
Weismann
Whale, paddle of
White Leghorn, crosses
Wilson, E. B.
Wing, development of
Winiwarter, von
Witch
Wood, T. B., on crossing of sheep
Woodland, W.
Woodpecker
X chromosome
Zeugopterus Zoaea
End of Project Gutenberg's Hormones and Heredity, by J. T. Cunningham