Module 1 (Cellular Control) Key Words

1. Organisms best adapted to their environment are most likely to survive and pass on their advantageous alleles to their offspring. Frequency of this allele increases in the gene pool over time (7, 9)
4. A specific position on a chromosome occupied by a specific gene (5)
5. An alternative version of a gene (6)
6. Genes for different characteristics that are present at different loci on the same chromosome are linked (7)
7. Characteristic in which the allele responsible is expressed in the phenotype, even in those with heterozygous genotype (8)
8. Where non-sister chromatids exchange alleles during prophase 1 of meiosis (8, 4)
9. A characteristic where both alleles contribute to the phenotype (10)

2. Humans select organisms with useful characteristics. Allows those with useful characteristics to breed and prevents those without from breeding. Humans have a significant impact on the evolution of these populations/species (10, 9)
3. Characteristic in which the allele responsible is only expressed in the phenotype if there is no dominant allele present. Not expressed when heterozygous and the expression is masked by the dominant allel (9)
10. The combination of alleles possessed by an organism (8)

Get Revising