The Science of Life, Volumen 4Cassell, 1931 - 896 páginas |
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Página 297
Herbert George Wells, Julian Huxley, George Philip Wells. t DIES The gene for yellow is dominant , and also lethal . When two " yellow genes are present , the mouse dies while still an embryo . Yellow mice therefore contain one gene for ...
Herbert George Wells, Julian Huxley, George Philip Wells. t DIES The gene for yellow is dominant , and also lethal . When two " yellow genes are present , the mouse dies while still an embryo . Yellow mice therefore contain one gene for ...
Página 300
... genes only - a very small minority . And an approximately equal minority with black genes only . The majority will have black and white mixed in various proportions , the likelihood of any tint turning up being the greater the nearer it ...
... genes only - a very small minority . And an approximately equal minority with black genes only . The majority will have black and white mixed in various proportions , the likelihood of any tint turning up being the greater the nearer it ...
Página 348
... genes ; normally one set outweighs the other completely . But in different species of gipsy - moth these genes seem to work at different rates . In the European species they are fairly slow . But in the Japanese species the whole tempo ...
... genes ; normally one set outweighs the other completely . But in different species of gipsy - moth these genes seem to work at different rates . In the European species they are fairly slow . But in the Japanese species the whole tempo ...
Índice
THE RANGE NATURE AND STUDY OF LIVING THINGS | 3 |
66 | 5 |
muscles and related | 8 |
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Términos y frases comunes
active algæ animals arthropods bacteria become birds blood body bones brain branches called capillaries carbon carbon dioxide cells Cenozoic changes chemical chromosomes colour creatures crustaceans digestive Echinoderms eggs elaborate embryo Eocene Everyman evolution example eyes fact female fertilized fish flatworms flowers fluid forms fossils gametes genes germ-plasm glands grow growth heart human Ichthyosaurs important individual insects intestine kidneys kinds land larvæ layer less limbs liver living things lobster lungs male mammals marsupials matter means ment microscopic million molluscs mouse mouth movements muscles mutations nervous system normal notochord Obelia organs ovary ovum oxygen pair parasitic phylum plants polyps produced proteins prothallus protozoa reproduction reptiles round secretion sense-organs sexual shell skeleton skin species spermatozoa sperms spores stage starfish stomach structure substances surface swim tail teeth thyroid tiny tion tissue to-day tube types variations various vertebrates whole worms