Suppose that blue eyes and curly hair are recessive traits. Use this information to define and illustrate Mendel’s first and second laws.
What will be an ideal response?
Ans: First law—the law of segregation. For a recessive trait to appear, an organism must have inherited the trait from both its parents. A blue-eyed child must have inherited the blue-eye allele of the eye color gene from both its mother and its father.
Second law—law of independent assortment. The inheritance of one trait does not influence the inheritance of another. A blue-eyed child may be curly haired or not. The recessive blue-eyed trait is completely independent of the recessive curly haired trait.
Learning Objective: 2.5 Explain the function of genes, epigenetics, and endophenotypes.
Cognitive Domain: Application
Answer Location: Epigenetic Processes
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