BIO 1201 GREGG UPDATED ACTUAL
QUESTIONS AND CORRECT ANSWERS
COMPREHENSIVE STUDY GUIDE
●● 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 egg
, ●● the 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
●● two alleles for a heritable character separate during gamete formation
and end up in different gametes
Answer: law of segregation
QUESTIONS AND CORRECT ANSWERS
COMPREHENSIVE STUDY GUIDE
●● 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 egg
, ●● the 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
●● two alleles for a heritable character separate during gamete formation
and end up in different gametes
Answer: law of segregation
