Below is a simplified chart for polygenic trait of eye colour. The amount of melanin in the iris is what determines the colour of the eye. People with brown eyes have more melanin in their iris than people with blue eyes. The amount of melanin is controlled by how many dominant alleles a person has for eye colour as follows: Number of Dominant Alleles Genotypes Phenotypes 4 AABB Very dark brown eyes 3 AaBB or AABb Brown eyes 2 AaBb, aaBB etc. Light brown or hazel eyes 1 Aabb or aaBb Dark blue eyes 0 aabb Light blue eyes Which of the following parental crosses explains how two brown-eyed parents can produce a blue-eyed child? Select one: a. AaBB AABb b. AaBB AaBb c. Aabb AABB d. AABB AaBb

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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.