Classrooms teach that earlobes can be divided into two clear categories, free and attached. Free earlobes are those that curve up between the lowest point of the earlobe and the point where the ear joins the head. Attached earlobes blend in with the side of the head. According to textbooks, free earlobes (F) are the dominant trait while attached earlobes are the recessive trait (A).The recessive allele is expressed to form an attached earlobe. Parents with attached earlobes will not necessarily give birth only to children with attached earlobes. Traits are the major factorsIf they pass that on (and the other parent does too), then the child will have the recessive trait. So for earlobes, imagine a parent with an attached and an unattached allele. This parent will have unattached earlobes but could pass the attached allele to their child Are attached earlobes recessive. That child might end up with attached earlobes. Are attached earlobes recessive.
22 Sep 2021, 02:07
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