LIFESCI 15 Lecture Notes - Lecture 5: Y Chromosome, Wild Type, Gamete
Document Summary
A trait can change over time within a species if : variation for a trait, heritability, differential reproductive success. The story of his life from the logbook of the natural history society of brunn (feb. , 1865): Gregor mendel spoke on the inheritance of pea plants. " there were no questions. A human"s genome: 46 chromosomes [compacted molecules (linear strand) of dna] arranged in 23 pairs. Full set from mother and full set from fathers => pairs. # homologous pairs = # pairs: visualizing the chromosome: Karyotype: a picture of all the chromosomes in a cell. Hundreds and thousands of genes on one chromosome. 10/12: a gamete receives only 1 allele for each gene (even though the organism generally has. ***the law of segregation points out that a gamete receives only one allele form the pair of alleles possessed by an organism. ***the test cross allows you to determine whether individuals showing the dominant trait are homozygous or heterozygous.
