What is a genotype?
Heredity and Punnett Squares

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Science
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9th - 12th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
A genotype is the genetic makeup of an organism, represented by the alleles it possesses (e.g., Hh, HH, hh).
2.
FLASHCARD QUESTION
Front
What is a phenotype?
Back
A phenotype is the observable physical or biochemical characteristics of an organism, determined by its genotype and environment.
3.
FLASHCARD QUESTION
Front
Define homozygous. What are the two types?
Back
Homozygous means having two identical alleles for a particular gene. The two types are homozygous dominant (e.g., HH) and homozygous recessive (e.g., hh).
4.
FLASHCARD QUESTION
Front
Define heterozygous. What does it mean?
Back
Heterozygous means having two different alleles for a particular gene (e.g., Hh).
5.
FLASHCARD QUESTION
Front
What is a dominant trait?
Back
A dominant trait is a characteristic that is expressed in the phenotype even when only one copy of the allele is present (e.g., yellow pea seeds).
6.
FLASHCARD QUESTION
Front
What is a recessive trait?
Back
A recessive trait is a characteristic that is expressed in the phenotype only when two copies of the allele are present (e.g., white fur color in the absence of a dominant allele).
7.
FLASHCARD QUESTION
Front
What does a Punnett square illustrate?
Back
A Punnett square is a diagram used to predict the genotypes and phenotypes of offspring from a genetic cross.
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