GCSE Biology: Inheritance, Variation & Evolution Mastery

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Practice questions on inheritance and evolution

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Eesa Kaiser

United Kingdom

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GCSE Biology: Inheritance, Variation & Evolution Mastery


GCSE Biology: Inheritance, Variation & Evolution MasteryVersion en ligne Practice questions on inheritance and evolution par Eesa Kaiser 1 What is the main difference between sexual and asexual reproduction? a Both use two parents b Sexual involves two parents and variation; asexual uses one parent and produces clones c Both produce genetic variation only in plants d Sexual produces clones; asexual produces variation 2 What is a gene? a A type of enzyme b A molecule that carries lipids only c A chromosome segment that carries nutrients d A section of DNA that codes for a protein 3 What is a phenotype? a The physical trait expressed by an organism b The organism's genotype only c The cell type of an organism d A gene's DNA sequence 4 What does a Punnett square show? a The age of parents during reproduction b Probabilities of offspring genotypes in a cross c Exact offspring traits d Environmental influences on traits 5 Dominant alleles require how many copies to express phenotype? a No copies needed b Two copies only c Two copies for sure d One or more copies (dominant expression) 6 What is natural selection? a The loss of variation in a population b All traits are equally selected c The process where best adapted individuals survive and reproduce d Random mating only 7 What is meant by variation in a population? a Only genetic mutations b All individuals identical c Differences in traits caused by genes, environment, or both d Only environmental changes 8 Which term describes changes in a population over time due to differential survival? a Mutation b Evolution c Adaptation d Speciation 9 What is the difference between genotype and phenotype? a Genotype is environment; phenotype is gene expression b Genotype and phenotype are always the same c Genotype is physical; phenotype is DNA sequence d Genotype is genetic makeup; phenotype is physical trait 10 How can genetic variation arise in populations? a Only environmental factors b Mutations, sexual reproduction, and environmental influences c Only asexual reproduction d Only mutations Feedback 1 Sexual reproduction combines genes from two parents, producing variation; asexual copies a single organism with no genetic variation. 2 Genes are specific DNA sections that code for proteins, guiding traits. 3 Phenotype is the observable trait resulting from genotype and environment. 4 Punnett squares estimate genotype probabilities in predicted offspring. 5 Dominant traits appear with at least one dominant allele; recessive needs two. 6 Natural selection favors advantageous traits, leading to evolution over time. 7 Variation arises from genetic differences, environmental factors, or their combination. 8 Evolution is the change in allele frequency and traits across generations. 9 Genotype = genes; phenotype = observable characteristics shaped by environment. 10 Variation comes from mutations, meiosis during sexual reproduction, and environment.

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GCSE Biology: Inheritance, Variation & Evolution Mastery

Test

À propos de cette activité

Créé par

Téléchargez la version pour jouer sur papier

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GCSE Biology: Inheritance, Variation & Evolution MasteryVersion en ligne

par Eesa Kaiser

What is the main difference between sexual and asexual reproduction?

What is a gene?

What is a phenotype?

What does a Punnett square show?

Dominant alleles require how many copies to express phenotype?

What is natural selection?

What is meant by variation in a population?

Which term describes changes in a population over time due to differential survival?

What is the difference between genotype and phenotype?

How can genetic variation arise in populations?

Feedback