Idk Flashcards
What is the basic unit of heredity?
Gene
True or False: A dominant allele can mask the expression of a recessive allele.
True
Fill in the blank: The physical appearance of an organism is called its _____.
phenotype
What term describes the genetic makeup of an organism?
genotype
Multiple Choice: Which of the following is NOT a method of asexual reproduction? a) Binary fission b) Budding c) Meiosis d) Fragmentation
c) Meiosis
What is the process by which organisms better adapted to their environment tend to survive and produce more offspring called?
Natural selection
True or False: Variation in a population can occur due to mutations.
True
Fill in the blank: The study of how traits are passed from parents to offspring is known as _____.
genetics
What type of reproduction involves the fusion of male and female gametes?
Sexual reproduction
Multiple Choice: Which of the following is a source of genetic variation? a) Independent assortment b) Mitosis c) Cloning d) All of the above
a) Independent assortment
What is the term for a change in the DNA sequence of a gene?
Mutation
True or False: All mutations are harmful.
False
Fill in the blank: The observable differences between individuals in a population are referred to as _____.
variation
What is the theory that explains how species evolve over time through the process of natural selection?
Darwin’s theory of evolution
Multiple Choice: Which of the following best describes a phenotype? a) A genetic trait b) A physical characteristic c) A type of allele d) A mutation
b) A physical characteristic
What do we call the combination of alleles an individual has for a specific gene?
Genotype
True or False: Sexual reproduction leads to greater genetic diversity compared to asexual reproduction.
True
Fill in the blank: The process by which genetic information is copied from DNA to RNA is called _____.
transcription
What is a homozygous genotype?
A genotype with two identical alleles for a trait.
Multiple Choice: Which of the following best describes evolution? a) Change in allele frequencies over time b) Change in physical appearance c) Change in environment d) Change in population size
a) Change in allele frequencies over time
What is the main purpose of meiosis?
To produce gametes with half the number of chromosomes.
True or False: Alleles are different forms of a gene.
True
Fill in the blank: The process by which traits are passed from parents to offspring is called _____.
inheritance
What is a phenotypic ratio?
The ratio of different phenotypes in the offspring.
Multiple Choice: Which of the following processes increases genetic variation? a) Mitosis b) Crossing over c) Cloning d) Budding
b) Crossing over
What is speciation?
The process by which new species arise.
