The length of the middle joint of the right index finger was measured in 10 sets of parents and their adult offspring. The mean parental lengths and the mean offspring lengths for each family are listed in the accompanying table. Calculate the regression coefficient for regression of mean offspring length against mean parental length and estimate the narrow-sense heritability for this characteristic. Mean parental length (mm) Mean offspring length (mm) 30 31 35 36 28 31 33 35 26 27 32 30 31 34 29 28 40 38 33 34

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Inheritance and Mendelian Genetics

Inheritance means the passing of traits to offspring from parents. These traits could be passed either through asexual reproduction or sexual reproduction. The offspring receives the genetic material from the parents. Mendelian inheritance is a certain biological inheritance that follows the rules and principles laid down by Gregor Mendel in 1865. The initial hypothesis was considered wrong, but other inheritance theories modified the concept of inheritance and thus genetics.