Journal of experimental zoology . )rimitive eclipse mallard feather])attern. 7 Fi or Australian X mallard, showing primitive ecli[)se mallard featherpattern. 8 Fi or Pintail X mallard; shows mallard chestnut, but poorly dexclopedand with no primitive mallard pattern. 9 Three-fourths blood black duck, Fi (mallard X black) X black. 10 Three-fourths blood Australian duck, Fi (mallard X Australian) X Aus-tralian. Both figures 9 and 10 preserve the primitive mallard pattern seen in Fiand Fo. 11 Three-fourths blood pintail duck Fi (mallard X pintailj X ])iutail; afaint creamv stain is all
Journal of experimental zoology . )rimitive eclipse mallard feather])attern. 7 Fi or Australian X mallard, showing primitive ecli[)se mallard featherpattern. 8 Fi or Pintail X mallard; shows mallard chestnut, but poorly dexclopedand with no primitive mallard pattern. 9 Three-fourths blood black duck, Fi (mallard X black) X black. 10 Three-fourths blood Australian duck, Fi (mallard X Australian) X Aus-tralian. Both figures 9 and 10 preserve the primitive mallard pattern seen in Fiand Fo. 11 Three-fourths blood pintail duck Fi (mallard X pintailj X ])iutail; afaint creamv stain is all that is left of the mallard chestnut. 142 HYBRIDIZATION AMONG DUCKS AND PHEASANTS JOHN C. PHILLIPS PLATE 9. 143 INHERITANCE IN HYDATINA SENTA II. CHARACTERS OF THE FEMALES AND THEIR PARTHENOGENETIC EGGS^ A. FRANKLIN SHULL The Department of Zoology, University of Michigan CONTENTS Introduction 145 Differentiating characters of the two lines 146 Difference in size of egg 146 Difference in time of egg development 150 Difference in rate of egg production 153 Difference in place of egg laying 154 Difference in contractility of foot muscles 157 Inheritance of differentiating characters 158 Inheritance of size of egg 159 Inheritance of time of egg development 164 Inheritance of rate of egg production 165 Inheritance of place of egg laying 169 Inheritance of contractilitj of foot muscles 171 Discussion 173 Review of results 173 Explanation of results 177 Did crossing actually occur? 177 Typical INIendelian behavior a possibility 179 The four characters perhaps identical 180 Association of factors 181 Summary 183 Bibliography 185 INTRODUCTION During the past few years, while working with the rotifer
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectzoology, bookyear1904
