Bio 1201 Gregg exam 3 questions and answers rated A+

Bio 1201 Gregg exam 3 questions and answers rated A+ the units of heredity and are made up of segments of DNA genes how many chromosomes do humans have in the nucleus of their somatic cells? 46 chromosomes (23 pairs) the two chromosomes in each pair are called... homologous chromosomes/homologs each pair of homologous chromosomes includes... one chromosome from each parent what does meiosis result in 4 haploid daughter cells what does meiosis 1 do separates homologous chromosomes when does crossing over and synapsis occur prophase 1 what does meiosis 2 do separates sister chromatids mitosis vs meiosis Mitosis: one division forming 2 identical cells (clones); Meiosis: two divisions forming 4 genetically different cells meiosis 2 is similar to mitosis because... sister chromatids separate how do different alleles occur through mutation what 3 things contribute to genetic variation crossing over, independent assortment, random fertilization when does independent assortment occur? metaphase I of meiosis random fertilization any sperm can fertilize any egg the mating of 2 true-breeding varieties hybridization p generation true-breeding parents f1 generation hybrid offspring of the P generation f2 generation offspring of the F1 generation alternative versions of a gene alleles the specific spot where a gene resides on a chromosome locus two alleles for a heritable character separate during gamete formation and end up in different gametes law of segregation organism with two identical alleles for a character homozygote organism with two different alleles for a gene heterozygote to determine the genotype, breed the mystery individual with a homozygous recessive individual testcross crossing two true-breeding parents differing in two characters produces ______ in the F1 generation, heterozygous for both characters dihybrids a cross between F1 which can determine whether two characters are transmitted to offspring as a package or independently is called? a dihybrid cross law of independent assortment each pair of alleles segregates independently of any other pair of alleles during gamete formation do genes located near each other on the same chromosome