Give two reasons why the chromosome number can be used to characterise a species. 3.2.U6 Diploid nuclei have pairs of homologous chromosomes. AND 3.2.U7 Haploid nuclei have one chromosome of each pair. Eukaryotic nuclei can be described as being haploid or diploid. Describe what is meant by these terms. Haploid Diploid List the types of cell in humans that are haploid and state the number of chromosomes present in the nuclei. List the types of cell in humans that are diploid and state the number of chromosomes present in the nuclei. Extension: give a type of human cell that is neither haploid nor diploid. 3.2.A3 Comparison of diploid chromosome numbers of Homo sapiens, Pan troglodytes, Canis familiaris, Oryza sativa, Parascaris equorum. Complete the table to compare diploid chromosome numbers in the selected organisms. Genome size Organism (million base pairs) Humans (Homo sapiens) Asian rice (Oryza sativa) Chimpanzee (Pan troglodytes) Domestic Dog (Canis familiaris)
Give two reasons why the chromosome number can be used to characterise a species. 3.2.U6 Diploid nuclei have pairs of homologous chromosomes. AND 3.2.U7 Haploid nuclei have one chromosome of each pair. Eukaryotic nuclei can be described as being haploid or diploid. Describe what is meant by these terms. Haploid Diploid List the types of cell in humans that are haploid and state the number of chromosomes present in the nuclei. List the types of cell in humans that are diploid and state the number of chromosomes present in the nuclei. Extension: give a type of human cell that is neither haploid nor diploid. 3.2.A3 Comparison of diploid chromosome numbers of Homo sapiens, Pan troglodytes, Canis familiaris, Oryza sativa, Parascaris equorum. Complete the table to compare diploid chromosome numbers in the selected organisms. Organism Genome size (million base pairs) Humans (Homo sapiens) Asian rice (Oryza sativa) Chimpanzee (Pan troglodytes) Domestic Dog (Canis familiaris)