BIO 235 Exam 1 Questions With Verified Answers

BIO 235 Exam 1 Questions With Verified Answers While undergoing mitosis, the ____ is the central regio on DNA that connects sister chromatids - answerCentromere Homologous chromosome pairs...? - answerhave a chromosome from mother and father, synapse during prophase of meiosis 1, same genes but different alleles, pair of sister chromatids during prophase meiosis 1 What stage of the cell cycle does DNA replication occur in preparation for division? - answerS phase What is one defining difference between DNA of G2 and G1 phases of the cell cycle? - answerG2 nucleus has 2 copies of each chromosome How many centromeres exist in the G1 phase of a diploid organism with 24 chromosomes? - answer24 A mammal's gametes contain 24 chromosomes (1n=24) how many chromosomes would we expect to find in its adult (somatic) cells? - answer48 Meiosis 2 results in a reduction, or halving of the number of chromosomes in each daughter cell. - answerFalse List 2 of the mechanisms discussed in class by which meiosis produces genetic variation - answerm orientation/distribution of homologous chromosomes in anaphase 1 2. crossing over What is a bivalent? - answera pair of homologous chromosomes which consist of sister chromatids How many chromatids are in 4 bivalents? - answer16 In meiosis, ___ separate during meiosis 1, and ___ separate during meiosis 2 - answerhomologous pairs, sister chromatids When an allele masks another allele in a heterozygote, preventing expression of the masked allele, this allele can be described as? - answerdominant