What is a Punnett Square?
Final EXAM REVIEW

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Biology
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9th 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 genotype is represented by 'tt'?
Back
The genotype 'tt' represents a homozygous recessive trait.
3.
FLASHCARD QUESTION
Front
What is the role of mRNA in genetics?
Back
mRNA (messenger RNA) copies the genetic instructions from DNA and carries them to the ribosome for protein synthesis.
4.
FLASHCARD QUESTION
Front
What is the function of the cell wall?
Back
The cell wall provides structural support and protection to the cell, and is found outside the cell membrane in plant cells.
5.
FLASHCARD QUESTION
Front
What organelle is known as the powerhouse of the cell?
Back
The mitochondria are known as the powerhouse of the cell because they are responsible for producing energy through cellular respiration.
6.
FLASHCARD QUESTION
Front
What does it mean if a trait is controlled by a dominant allele?
Back
If a trait is controlled by a dominant allele, it means that only one copy of the dominant allele is needed for the trait to be expressed.
7.
FLASHCARD QUESTION
Front
What is the difference between dominant and recessive alleles?
Back
Dominant alleles express their traits even when only one copy is present, while recessive alleles require two copies to express their traits.
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