HEREDITY
MONOHYBRID CROSS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The parents may both have recessive genes for blue eyes.
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The child was born during the winter
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Eye color in humans is not an inherited trait
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The child was deprived of oxygen during its birth
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Detailed explanation-1: -For two parents with brown eyes to have a blue-eyed child, both parents must genetically be Bb. When this happens, there is a 1 in 4 chance that these parents will have a bb child with blue eyes.
Detailed explanation-2: -It illustrates the law of dominance which states that “out of a pair of contrasting characters brought together in an offspring, one always dominates over the other. The one that is expressed is dominant and the one that remains masked is recessive.
Detailed explanation-3: -If both parents have brown eyes, a quarter of the children will have blue eyes, and three quarters will have brown eyes. The brown eye form of the eye color gene (or allele) is dominant, whereas the blue eye allele is recessive.