Inheritance, DNA and Protein Synthesis
Use genetic terminology and crosses, interpret pedigrees and connect DNA sequence to proteins and mutation effects.
How to prepare for the current ESAT
Confirm your course combination, build no-calculator fluency from Mathematics 1 upward, and use official Pearson materials for authentic timing and interface rehearsal.
Core concepts
Concept 1
Represent alleles and use monohybrid crosses, pedigrees, probabilities and ratios.
Exam cue: Define symbols and parental genotypes before a genetic cross.
Concept 2
Describe DNA as nucleotide polymers with complementary bases and a coded sequence.
Exam cue: Separate genotype from observable phenotype.
Concept 3
Connect base triplets to amino-acid order, protein shape and possible mutation effects.
Exam cue: Follow the sequence DNA bases to amino acids to protein structure to phenotype.
Risk pitfalls and guardrails
Treating dominant as more common or stronger.
Guardrail: Do not use calculator-dependent shortcuts, import a fact outside the annual specification or overlook a unit, sign, scale or course-module boundary.
Inferring a genotype from phenotype without considering alternatives.
Guardrail: Do not use calculator-dependent shortcuts, import a fact outside the annual specification or overlook a unit, sign, scale or course-module boundary.
Assuming every mutation changes phenotype.
Guardrail: Do not use calculator-dependent shortcuts, import a fact outside the annual specification or overlook a unit, sign, scale or course-module boundary.
Memory anchors
Genotype
The allele combination carried by an organism.
Phenotype
The observable characteristic arising from genotype and environment.
Complementary bases
A pairs with T; G pairs with C.
Triplet
Three DNA bases code for one amino acid.
Protein shape
Amino-acid sequence influences three-dimensional protein function.
Mutation range
A DNA change may have no, small or major phenotypic effect.
Checkpoint rule
Do the check-up only after you can summarize each concept in one sentence and identify one dangerous pitfall from memory.
Knowledge Check (after reading)
Short check-up to confirm understanding of this module.
Check-up Questions
A gene is?
Alleles are?
Answer all questions to submit.
Next step personalized recommendations
Continue learning
Move forward only after this module is stable.
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