Genetics and DNA Fundamentals
Genetics explains how traits are inherited and how genetic information is stored, copied, and expressed in living organisms. DNA serves as the blueprint for life, carrying the instructions needed for growth, development, and reproduction. Understanding genetics is essential for studying evolution, biotechnology, medicine, and molecular biology. This flashcard deck introduces the fundamental concepts of genetics using clear, easy-to-review questions and answers. The deck covers DNA structure, genes, chromosomes, nucleotides, complementary base pairing, DNA replication, transcription, translation, and protein synthesis. It also introduces the principles of Mendelian genetics, including dominant and recessive alleles, genotype, phenotype, homozygous and heterozygous traits, and the basic patterns of inheritance. Together, these topics provide a solid understanding of how genetic information is transmitted from one generation to the next. Designed for students and lifelong learners, these flashcards simplify complex biological concepts into manageable study questions that are ideal for classroom learning, exam preparation, and quick revision. Regular practice with this deck can improve memory, reinforce important terminology, and build a strong foundation for more advanced genetics topics.
All Cards in This Deck
Question
What is DNA?
Answer
DNA (deoxyribonucleic acid) is the hereditary molecule that stores genetic information in living organisms.
Question
What is a gene?
Answer
A gene is a segment of DNA that contains the instructions for producing a functional product, usually a protein.
Question
What is a chromosome?
Answer
A chromosome is a long DNA molecule associated with proteins that carries many genes.
Question
What are the four nitrogenous bases in DNA?
Answer
Adenine (A), Thymine (T), Cytosine (C), and Guanine (G).
Question
Which DNA bases pair together?
Answer
Adenine pairs with Thymine, and Cytosine pairs with Guanine.
Question
What is the shape of a DNA molecule?
Answer
A double helix.
Question
What is DNA replication?
Answer
DNA replication is the process by which DNA makes an identical copy of itself before cell division.
Question
Which enzyme unwinds the DNA double helix during replication?
Answer
DNA helicase.
Question
What is the purpose of DNA polymerase?
Answer
DNA polymerase synthesizes new DNA strands by adding complementary nucleotides.
Question
What is transcription?
Answer
Transcription is the process of copying genetic information from DNA into messenger RNA (mRNA).
Question
What is translation?
Answer
Translation is the process in which ribosomes use mRNA to build proteins.
Question
What is mRNA?
Answer
Messenger RNA carries genetic instructions from DNA to ribosomes for protein synthesis.
Question
What is a nucleotide?
Answer
A nucleotide is the basic building block of DNA, consisting of a sugar, phosphate group, and nitrogenous base.
Question
Who is known as the father of genetics?
Answer
Gregor Mendel.
Question
What is an allele?
Answer
An allele is an alternative form of the same gene.
Question
What is the difference between genotype and phenotype?
Answer
Genotype is an organism's genetic makeup, while phenotype is its observable characteristics.
Question
What is a dominant allele?
Answer
A dominant allele is expressed whenever it is present, even if only one copy is inherited.
Question
What is a recessive allele?
Answer
A recessive allele is expressed only when two copies are present.
Question
What is a homozygous genotype?
Answer
A homozygous genotype contains two identical alleles for a gene.
Question
What is a heterozygous genotype?
Answer
A heterozygous genotype contains two different alleles for a gene.