Answer:
1/2 or 50%
Explanation:
Given that the extra digit is a dominant trait, the man with an extra digit may be homozygous or heterozygous dominant for the trait.
However, having a daughter with his normal wife makes him heterozygous dominant. Let's assume that the genotype of the heterozygous dominant male is "Dd" and that of his wife is "dd".
The heterozygous dominant male and homozygous recessive female would have progeny in the following ratio= 1/2 Dd (child with extra digit): 1/2 dd (child with no extra digit).
Each child inherits 50% of DNA from each parent
In each nucleus of a human cell there is a material carrying property called DNA. This inheritance is due to the fusion of genes from father and mother, which produces child genes. Each DNA carries millions of proteins that have a combination of Adenine, Guanine, Thymine and Cytosine. Each different combination decreases different human traits.
So no wonder, a child can have his father's face, mother's hair, father's skin and eyes similar to Mother's. This is evidence of a decrease in the nature of the parents in the child.
Each child inherits 50% of DNA from each parent, but there are certain genes from the dominant Mother or Father. This is the reason the youngest's skin can be dark like Mother's but has a facial character more like his father's. While the Eldest's face can resemble the Mother but the color of his skin is more like his father's. if the faces of siblings and siblings look alike, that means they inherit a combination of similar genes.
Little can even inherit certain bodily expressions and postures such as the brow of the Mother who wrinkles when thinking. if the father experiences hair loss or baldness, the child can also experience it at a certain age.
The shape of the face along with certain characteristics such as high eyebrows, dimples, sharp nose or pug can be passed down in the family. Similarly, the shape of the hands, fingers, hair shape. Even the shape and position of one tooth with another can be the same. so often we see similar face shapes in a large family.
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dominant trait : https://brainly.com/question/13247892
Detail
Class: Colleege
Subject: biology
Keywords : dominant trait, inheritance, ganes, expressions, characteristic, human traits
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