What is natural selection?
2024 DNA, Reproduction, Genetics & Heredity Test

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Science
•
8th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
Natural selection is the process by which organisms better adapted to their environment tend to survive and produce more offspring. It is a key mechanism of evolution.
2.
FLASHCARD QUESTION
Front
What is antibiotic resistance?
Back
Antibiotic resistance occurs when bacteria evolve and develop the ability to survive exposure to antibiotics that would normally kill them or inhibit their growth.
3.
FLASHCARD QUESTION
Front
What is a dominant allele?
Back
A dominant allele is a variant of a gene that will express its trait in the phenotype even if only one copy is present (e.g., P for purple flowers).
4.
FLASHCARD QUESTION
Front
What is a recessive allele?
Back
A recessive allele is a variant of a gene that only expresses its trait in the phenotype if two copies are present (e.g., p for white flowers).
5.
FLASHCARD QUESTION
Front
What is a Punnett Square?
Back
A Punnett Square is a diagram used to predict the genetic makeup of offspring from a cross between two parents.
6.
FLASHCARD QUESTION
Front
What is a chromosome?
Back
A chromosome is a long, organized structure of DNA and proteins that contains genes.
7.
FLASHCARD QUESTION
Front
What is a mutation?
Back
A mutation is a change in the DNA sequence of an organism's genome, which can lead to changes in traits.
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