BIOLOGY 1A03 Lecture Notes - Lecture 3: Monosomy, Mendelian Inheritance, Edwards Syndrome

• School: McMaster University
• Department: Biology
• Course: BIOLOGY 1A03
• Professor: Roger Jacobs

Document Summary

Homologus chromosomes (aka homologs)- pairs of chromosomes; same size and shape, located at identical locations; carry same gene. Chromosomes- composed of dna and proteins, carry genes(hereditary info), Karyotype-display of an individual"s chromosomes that is organized in terms of chromosome number, size and type. Diploid- two versions of each type of chromosome; two alleles of each gene. Brings 2 gametes (one from male and one from the female) together. Gametes are n (haploid) and differ one from another in gene composition. Gametes have half the dna content of each parent nucleus. Each parent passes on half of its genes to its offspring. Offspring inherit a unique combination (mixture) of genes from both parents (genetic. Each diploid individual receives both a haploid chromosome set from its mother and a haploid set from its father. So maternal chromosomes come from the mother and paternal chromosomes come from the father. Reduce chromosome number from 2n (diploid) to n (haploid)