Explain how crossing over and random bivalent orientation produce new combinations of inherited alleles.
Tę umiejętność sprawdza 5 zadań wzorowanych na arkuszach IB z lat 2022–2026.
Which event creates different combinations of maternal and paternal chromosomes among gametes? A. Copying a chromosome before an ordinary mitotic division B. Equal partition of cytoplasm in a skin cell C. Independent orientation of homologous chromosome pairs…
Explain how sexual reproduction produces genetic variation.
(a) Describe how proteins are built from their constituent units. (b) Explain hormonal regulation of human blood glucose concentration. (c) Explain how meiosis contributes to genetic variation.
(a) Describe the role of mRNA in polypeptide synthesis. (b) Describe why haemophilia is more frequent in males than females. (c) Explain how changes in chromosomes can contribute to evolution.
Inheritance and cell division contribute to biological variation. (a) Draw and label one RNA nucleotide. (b) Distinguish mitosis from meiosis. (c) Explain how natural selection can produce antibiotic resistance in a bacterial population.
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