bio 1201 gregg exam 3 Questions With 100% Correct Answers.

the units of heredity and are made up of segments of DNA - Answer-genes how many chromosomes do humans have in the nucleus of their somatic cells? - Answer-46 chromosomes (23 pairs) the two chromosomes in each pair are called... - Answer-homologous chromosomes/homologs each pair of homologous chromosomes includes... - Answer-one chromosome from each parent what does meiosis result in - Answer-4 haploid daughter cells what does meiosis 1 do - Answer-separates homologous chromosomes when does crossing over and synapsis occur - Answer-prophase 1 what does meiosis 2 do - Answer-separates sister chromatids mitosis vs meiosis - Answer-Mitosis: one division forming 2 identical cells (clones); Meiosis: two divisions forming 4 genetically different cells meiosis 2 is similar to mitosis because... - Answer-sister chromatids separate how do different alleles occur - Answer-through mutation what 3 things contribute to genetic variation - Answer-crossing over, independent assortment, random fertilization when does independent assortment occur? - Answer-metaphase I of meiosis random fertilization - Answer-any sperm can fertilize any eggthe mating of 2 true-breeding varieties - Answer-hybridization p generation - Answer-true-breeding parents f1 generation - Answer-hybrid offspring of the P generation f2 generation - Answer-offspring of the F1 generation alternative versions of a gene - Answer-alleles the specific spot where a gene resides on a chromosome - Answer-locus