Genetics Exam Review

Flashcard
•
Biology
•
9th Grade
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What does 'T' and 't' represent in genetics?
Back
T represents the dominant allele for tallness, while t represents the recessive allele for shortness.
2.
FLASHCARD QUESTION
Front
What is a Punnett square used for?
Back
A Punnett square is used to predict the genotypes of offspring from a genetic cross.
3.
FLASHCARD QUESTION
Front
What is a homozygous genotype?
Back
A homozygous genotype has two identical alleles for a trait, such as AA or aa.
4.
FLASHCARD QUESTION
Front
What is a heterozygous genotype?
Back
A heterozygous genotype has two different alleles for a trait, such as Aa.
5.
FLASHCARD QUESTION
Front
What is the difference between dominant and recessive alleles?
Back
Dominant alleles express their trait even when only one copy is present, while recessive alleles require two copies to express their trait.
6.
FLASHCARD QUESTION
Front
What is a dihybrid cross?
Back
A dihybrid cross involves two traits being studied simultaneously, typically represented in a 4x4 Punnett square.
7.
FLASHCARD QUESTION
Front
What is a mutation?
Back
A mutation is a change in the DNA sequence that can lead to changes in traits.
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