Biology 1001A Lecture Notes - Lecture 13: Chromosome, Sequential Hermaphroditism, Sex Organ
1 Apr 2016
School
Department
Course
Professor
Document Summary
Ways in which sexual reproduction increases genetic variability. Recombination generates and maintains genetic diversity (new combination of alleles) o o o. Sections of chromosomes can exchange genetic material (crossing over) thereby forming different arrays of nucleotides. Recombination can produce different combinations of genes along a chromosome. Millions of different kinds of gametes can be produced from recombination alone. Offspring are genetically distinct from either parent and each other (usually) Differences between mutation and sexual recombination in generating new genetic variants. Sexual recombination in meiosis creates genetic diversity (new combinations of alleles) o o o. Offspring are distinct from either parent and (usually) siblings. Recombination is a highly controlled and precise process o. Explain vegetative propagation, and facultative/obligate asexual reproduction. o. During meiosis and fertilization, genetic variability arises from four sources: The differing combinations of maternal and paternal chromosomes segregated to the poles during anaphase i. The differing combinations of recombinant chromatids segregated to the poles during anaphase ii.
