Trace two rounds of segregation from a diploid nucleus to haploid products and explain the role in sexual life cycles.
Tę umiejętność sprawdza 12 zadań wzorowanych na arkuszach IB z lat 2022–2025.
Which event occurs during both mitosis and a complete meiotic division sequence? A. Homologous chromosomes pair as bivalents in every division B. Sister chromatids separate C. Crossing over is obligatory in mitosis D. Chromosome number doubles at each…
(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.
Which event occurs in mitosis and also during meiosis II? A. Sister chromatids separate after their centromeric association is released B. Homologous pairs undergo crossing over in every division C. Homologous chromosomes pair at the equator in both processes…
A child has three copies of chromosome 18 after an error during formation of a parental gamete. Which event could have produced that gamete? A. Homologous chromosome pairs failed to separate during anaphase II B. Both homologues moved to the same pole in the…
A cell from a diploid animal is shown with its chromosome complement represented schematically. Which classification best fits the chromosome complement? A. A haploid unfertilized egg B. A cell with no homologous chromosome pairs C. A diploid body cell D. A…
State the chromosome number expected in a male or female gamete.
Why does a normal gamete from a diploid organism carry one allele at each autosomal locus? A. All alleles are destroyed during fertilization B. It is haploid and contains one member of each homologous chromosome pair C. Mitosis removes every recessive allele…
Which change normally occurs in meiosis I? A. Homologous chromosomes separate, reducing the number of chromosome sets B. All sister chromatids separate to give four nuclei immediately C. The two resulting nuclei acquire identical combinations of parental…
Which change normally occurs in meiosis I? A. Homologous chromosomes separate, reducing the number of chromosome sets B. All sister chromatids separate to give four nuclei immediately C. The two resulting nuclei acquire identical combinations of parental…
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.
One diploid germ cell completes ordinary meiosis during sperm production. Which outcome describes the nuclear products before differentiation? A. Two diploid nuclei with identical alleles B. Four haploid nuclei, normally with the same chromosome number C. Four…
Which change occurs during the first meiotic division of a diploid cell? A. Homologous chromosome pairs separate, reducing the number of chromosome sets B. DNA is duplicated for the second time since interphase C. Sister chromatids must separate before…
Zapisujemy na Twoim urządzeniu to, bez czego serwis nie działa, np. zalogowanie. Plików analitycznych użyjemy tylko za Twoją zgodą. Szczegóły w polityce prywatności.