OBJECTIVE LIFE SCIENCE
GENETICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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What does a Punnet square show?
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all the possible outcomes of a genetic cross
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only the dominant alleles in a genetic cross
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only the recessive alleles in a genetic cross
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all of Mendel’s discoveries about genetics
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Explanation:
Detailed explanation-1: -The Punnett square is a table in which all of the possible outcomes for a genetic cross between two individuals with known genotypes are given. In its simplest form, the Punnett square consists of a square divided into four quadrants.
Detailed explanation-2: -A Punnett square shows the probability of an offspring with a given genotype resulting from a cross. It does not show actual offspring. For example, the Punnett square in Figure 3 shows that there is a 25% chance that a homozygous recessive offspring will result from the cross Aa x Aa.
Detailed explanation-3: -Punnett squares are used to show possible combinations of alleles or to predict the probability of a trait occurring in offspring.
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