BSC 1005 Exam 3 questions And Answers Verified 100% Correct

BSC 1005 Exam 3 questions And Answers Verified 100% Correct 1) Upon completion of telophase I and cytokinesis, there is(are) ______ cell(s). A) one diploid B) four diploid C) four haploid D) two diploid E) two haploid - ANSWER -E) two haploid 2) Which of the following is a characteristic seen in prophase I that does not occur in prophase II? A) Chromosomes move to the middle of the cell. B) Crossing over occurs. C) Chromosomes have been duplicated. D) Cytokinesis occurs. E) Spindle formation occurs. - ANSWER -B) Crossing over occurs. 3) Alleles are described as ______. A) homologous chromosomes B) Punnett squares C) alternate versions of a gene D) environmental factors that affect gene expression E) alternate phenotypes - ANSWER -C) alternate versions of a gene 4) A true-breeding plant that produces yellow seeds is crossed with a true breeding plant that produces green seeds. The F1 plants have yellow seeds. What is the expected phenotypic ratio of seed color of the offspring of an F1 × F1 cross? A) 1:2:1 B) 3:1 C) 1:1 D) 2:1 E) 9:3:3:1 - ANSWER -B) 3:1 5) What name is given to the specific location of a gene on a chromosome? A) genotype B) phenotype C) allele D) locus E) chromaddress - ANSWER -D) locus 6) In humans, the presence or absence of dimples is a trait controlled by a single gene. What is the genotype of an individual who is heterozygous for dimples? A) dimples B) DI C) dd D)DD E)Dd - ANSWER -E)Dd 7) Mendel crossed true-breeding purple-flowered plants with true-breeding white-flowered plants, and all of the resulting offspring produced purple flowers. The allele for purple flowers is ______. A) recessive B) independent C) monohybrid D) segregated E) dominant - ANSWER -E) dominant 8) One difference between mitosis and meiosis is ______. A) mitosis produces more daughter cells than meiosis B) meiosis is needed for growth and tissue repair, but mitosis is not C) mitosis requires only one parent cell, but meiosis requires two parent cells D) mitosis produces haploid cells, but meiosis produces diploid cells E) mitosis produces cells genetically identical to the parent cell, but meiosis does not - ANSWER -E) mitosis produces cells genetically identical to the parent cell, but meiosis does not 9) An individual with the genotype AaBb produces four different gametes in equal proportions. This is a demonstration of ______. A) Mendel's law of independent assortment B) crossing over C) the chromosomal theory of inheritance D) Mendel's principle of segregation E) linkage - ANSWER -A) Mendel's law of independent assortment 10) A ______ describes a site of crossing over. A) chromatid B) synapse C) histone D) chiasma E) centromeres - ANSWER -D) chiasma 11) What is the key to the recognition of incomplete dominance? A) The trait exhibits a continuous distribution. B) The alleles affect more than one trait. C) The heterozygote expresses the phenotype of both homozygotes. D) The phenotype of the heterozygote falls between the phenotypes of the homozygotes. E) The dominant allele is always expressed. - ANSWER -D) The phenotype of the heterozygote falls between the phenotypes of the homozygotes. 12) An individual who is homozygous ______.