BSC 1005 Exam 3 Study Guide Questions And Answers Verified 100% Correct

BSC 1005 Exam 3 Study Guide Questions And Answers Verified 100% Correct during which stage of the cell cycle does cytokinesis usually occur - ANSWER telophase what is the difference between a benign and malignant tumor - ANSWER -a malignant tumor metastasize and a benign does not skin cancer is a type of - ANSWER -carcinoma which of these will help you achieve your goal of dying of cancer - ANSWER avoid colonoscopies a karyotype would be unable to determine - ANSWER -eye color homologous chromosomes - ANSWER -carry the same gene sequence what is the sex chromosome of a normal human male - ANSWER -XY how many autosomes do humans have - ANSWER -44 genetically, human.... - ANSWER -children are equally chromosomes that do not determine sex are called - ANSWER -autosomes how does prophase I differ from prophase II - ANSWER -prophase I =one diploid cell; prophase II= 2 haploid cells how much genetic material is present in a cell during prophase I compared with a cell that has completed meiosis II - ANSWER -twice as much during prophase I, the pairing of homologus chromosomes results in the formation of a - ANSWER -tetrad during metaphase I - ANSWER -tetrads line up on the midline of the cell upon completion of telophase I and cytokinesis there are ______ cells - ANSWER -2 haploid which of the following occurs during prophase I but not prophase II - ANSWER tetrads form difference between mitotic anaphase and anaphase II - ANSWER -anaphase II=cells are haploid and sister chromatids seperate; mitotic anaphase = cells are diploid and homologous pairs seperate genetic variation is NOT increased by - ANSWER -the events of anaphase II anaphase I - ANSWER -homologous chromosomes seperate and migrate to opposite poles; which homologue goes to which pole is randome for a species with four pair of chromosomes, how many genetic combinations are possible - ANSWER -16 _________ represents sites of crossing over - ANSWER -chiasma crossing over during prophase I results in - ANSWER -genetic recombination how many chromosomes will a gamete produce as a result of nondisjunction - ANSWER -n +1 or n-1 what is the genetic complement of an individual with turner syndrome - ANSWER -2n-1 genetic material is duplicated during - ANSWER -s phase ______ is a carcinogen that may promote colon cancer - ANSWER -fat asexual reproduction requires ____ individuals - ANSWER -1 both mitosis and meiosis are preceded by - ANSWER -interphase which of these is NOT a component of meiosis - ANSWER -random fertilization when is amniocentesis usually done - ANSWER -between 14th and 20th week ______ is the trait most commonly found in nature - ANSWER -wild type true-breeding plants ---- - ANSWER -self-fertilize to produce offspring identical to the parent the mating between a pedigree chihuahua and a great dane would produce a - ANSWER -hybrid what are alleles - ANSWER -alternate forms of a gene a true breeding plant that produces yellow seeds is crossed with a true-breeding plant that produces green seeds. all of the seeds of all of the offspring are yellow. Why? - ANSWER -the yellow allele is dominant to the green allele what is the expected phenotypic ratio of seed color of the offspring - ANSWER 3:1 according to mendel's principle of segregation - ANSWER -gametes have one copy of each allele attached earlobes are recessive to free earlobes. what genotypic ratio is expected when an individual with attached earlobes mates with an individual heterozygous for free earlobes? - ANSWER -1:1 attached earlobes are recessive to free earlobes. what phenotypic ratio is expected when an individual with attached earlobes mates with an individual heterozygous for free earlobes? - ANSWER -50&