BSC 114 Exam 3 Questions And Answers 100% Pass

somatic cells have __ chromosomes - correct answers 46 chromatin is found in the - correct answers nucleus reproductive cells have __ chromosomes - correct answers 23 reproductive cells - correct answers germ cells cells total hereditary endowment of DNA - correct answers genome DNA is complexed with proteins called - correct answers histones __ forms chromosomes - correct answers chromatin length of cell cycle varies from - correct answers 10-30 hours G1 - correct answers growth S - correct answers replication G2 - correct answers preparation for division function of mitosis - correct answers separate genetic info into 2 quantities organize microtubules of spindle apparatus - correct answers centrosomes region where chromatids are held together - correct answers centromere protein structure on chromatids where spindle microtubules attach - correct answers kinetochore kinetochore is located at the __ region - correct answers centromere interphase has __ nucleus - correct answers 1 interphase has __ chromosomes, each consisting of __ chromatid(s) - correct answers 46, 1 prophase has __ nucleus - correct answers 1 prophase has __ chromosomes, each consisting of __ chromatid(s) - correct answers 46, 2 telophase has __ nucleus - correct answers 2 t/f: cell cycle includes both interphase and mitosis - correct answers true t/f: interphase is much longer and complicated than mitosis - correct answers true __ phase of cell cycle is the key phase in controlling cell division - correct answers G1 determines whether cell divides - correct answers restriction point of G1 stimulates other cells to divide - correct answers growth factor says that crowded cells usually stop dividing - correct answers density dependent inhibition a single individual is the sole parent and passes on all of its genes directly to its offspring - correct answers asexual reproduction group of genetically identical individuals - correct answers clone t/f: no multicellular organisms can reproduce asexually - correct answers false, some can the only possible differences between the parent and offspring will be via __ - correct answers mutations much greater genetic variation results from __ reproduction compared to __ reproduction - correct answers sexual, asexual karyotype organizes chromosomes according to - correct answers number, size, type chromosomes in karyotype are arrested in the __ stage of mitosis - correct answers metaphase chromosomes that look quite similar but were inherited from different parents - correct answers homologous chromosomes in __ organisms, chromosomes are matched in homologous pairs - correct answers diploid specific location of a gene - correct answers locus homologs differ in the version of some genes at their corresponding __ - correct answers loci X and Y - correct answers sex chromosomes non sex chromosomes - correct answers autosomes cell with a single set of chromosomes - correct answers haploid cell containing 2 sets of chromosomes, one from each parent - correct answers diploid process that halves the diploid set to a single haploid set of chromosomes - correct answers meiosis restores the diploid set from meiosis - correct answers fertilization meiosis II results in __ daughter cells instead of 2 and each has only __ the number of chromosomes - correct answers 4, half arrangement of chromosomes on the __ plate determines which chromosomes will be packaged together - correct answers metaphase I a point at which paired chromosomes remain in contact during metaphase I of meiosis, and at which crossing over and exchange of genetic material occur. - correct answers chiasmata crossing over occurs during __ of meiosis I - correct answers prophase __ produces individual chromosomes that combine genes inherited from our 2 parents - correct answers crossing over when homologous portions of 2 non sister chromatids trade places - correct answers recombination humans have __-__ crossovers per pair of chromosomes - correct answers 2-3 yellow, purple, round - correct answers dominant green, white, wrinkled - correct answers recessive each gamete has __ allele(s) - correct answers 1 members of a pair of genes separate from each other during gamete formation - correct answers law of segregation each character an organism inherits __ allele(s) - correct answers 2 alternate versions of genes - correct answers alleles genetic composition - correct answers genotype outward appearance - correct answers phenotype cross involving genes at 1 locus - correct answers monohybrid cross to determine genotype of a parent with a dominant phenotype, a __ can be done on unknown genotype - correct answers test cross tester - correct answers homozygous recessive mendel's second law - correct answers law of independent assortment says that genes for a pair of traits are distributed independently of one another when gametes are formed - correct answers law of independent assortment law of independent assortment only occurs when the genes are - correct answers on separate chromosomes examines the inheritance of genes at __ loci - correct answers 2 dominant allele codes for - correct answers functional protein recessive allele codes for - correct answers nonfunctional protein __ dominance says that YY and Yy have the same phenotype - correct answers complete __ dominance says that both alleles are expressed. ex: AB blood - correct answers co __ dominance says that the phenotype is intermediate between homozygous phenotypes - correct answers incomplete an individual can only have __ alleles per locus - correct answers 2 t/f: an individual can only have 2 alleles per locus, but there can be more than 2 in the population - correct answers true blood groups are examples of (2) - correct answers multiple alleles and codominance