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Яна Антилевская

30 апр 2020 30.04.2020

§ 46. Изменчивость организмов, ее типы.

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Модификационная изменчивость

Роль генотипа и условий среды в формировании признаков. Изучая за-

кономерности наследования признаков, мы убедились, что фенотип определяется ге-

нотипом. В ряде случаев признак действительно формируется только под влиянием

генотипа и не зависит от условий среды, в которых развивается организм. Например,

у человека, имеющего в генотипе гены I

A и I

B, независимо от условий жизни фор-

мируется IV группа крови. В то же время рост, масса тела, количество эритроцитов

в крови и многие другие признаки зависят еще и от условий окружающей среды

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