What is a Punnett Square?
Punnett Squares

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•
Biology
•
7th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
A Punnett Square is a diagram used to predict the outcome of a genetic cross by showing the possible combinations of alleles from the parents.
2.
FLASHCARD QUESTION
Front
What do the letters G and g represent in genetics?
Back
G represents a dominant allele (green scales) and g represents a recessive allele (white scales).
3.
FLASHCARD QUESTION
Front
What is the expected offspring ratio when crossing two heterozygous parents (Gg x Gg)?
Back
The expected offspring ratio is 3 green scales to 1 white scale.
4.
FLASHCARD QUESTION
Front
What is a genotype?
Back
A genotype is the genetic makeup of an organism, represented by the alleles it possesses (e.g., Aa, Bb).
5.
FLASHCARD QUESTION
Front
What is a phenotype?
Back
A phenotype is the observable physical or biochemical characteristics of an organism, determined by its genotype.
6.
FLASHCARD QUESTION
Front
What is the probability of a child having blue eyes if both parents are brown-eyed (Bb)?
Back
The probability is 25%.
7.
FLASHCARD QUESTION
Front
What does it mean if two organisms have the same phenotype but different genotypes?
Back
It means they exhibit the same physical traits but have different genetic compositions (e.g., one is homozygous BB and the other is heterozygous Bb).
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