Distinguish new alleles produced by mutation from new allele combinations produced by sexual reproduction.
Tę umiejętność sprawdza 6 zadań wzorowanych na arkuszach IB z lat 2024–2026.
Which conditions can contribute to natural selection in a population? I. A habitat change that alters relative survival II. Inherited differences in a relevant trait III. Exactly equal reproductive success for every genotype in every generation Choose the…
Which statement correctly distinguishes two sources of heritable variation? A. Mutation can generate new alleles, whereas sexual reproduction reshuffles alleles into new combinations B. Fertilisation prevents offspring from differing genetically C. Meiosis…
Explain how predation can produce the observed evolutionary change.
Related island birds have evolved different beak shapes and feeding habits. (i) Outline how the differences in beaks could have evolved. (ii) Describe how chromosome number is maintained when a growing bird produces new body cells.
A newly arising heritable variant improves survival in a particular environment. Which pairing gives a possible source of that variant and a likely long-term effect of selection on competing alleles? A. Mutation; the competing alleles may decline in frequency…
A DNA sequence variant not previously present appears in a population. Which process can create this new allele? A. Producing genetically identical copies without mutation B. A change in a gene’s nucleotide sequence C. Sorting existing alleles into gametes…
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