BIO 100 | HUMAN BIOLOGY UNIT 6 MILESTONE | EXAM 2 | Already Graded A+

HUMAN BIOLOGY UNIT 6 MILESTONE Being left-handed (represented as l) is a recessive trait. Jim and Suzie are both left-handed. If they have a child, which of the following could be his/her genotype? • Eithe ...

HUMAN BIOLOGY UNIT 6 MILESTONE Being left-handed (represented as l) is a recessive trait. Jim and Suzie are both left-handed. If they have a child, which of the following could be his/her genotype? • Either Ll or ll • LL • Ll • ll CONCEPT Punnett Squares What do all nucleotides have? • A five-carbon sugar, a nitrogen group and a phosphorous base • A five-carbon sugar, a phosphate group and a nitrogenous base • A five-carbon sugar, an amino acid and a peptide bond • Six-carbon monosaccharides bonded together in long branching chains CONCEPT Structure of DNA and Chromosomes The final phase of translation, called termination, is signaled by three nucleotides, called a , that mark the end of a polypeptide chain. • stop codon • plasmid • CONCEPT Protein Synthesis, Part 2: Translation Which of the following statements is true about recombinant DNA? • It contains DNA from more than one species. • All of the answer choices are correct. • It is used in genetic engineering. • It utilizes bacterial plasmids. CONCEPT DNA Technology and Research What is the gene that goes with a trait called? • Phenotype • Genotype • Heredity • Recessive allele CONCEPT Heredity A father has red-green colorblindness, his wife does not, nor is she a carrier. What are the odds that their daughter is a carrier for red-green colorblindness? • 25% • 0% • 100% CONCEPT X-Linked Traits Which of these is an autosomal recessive disorder that can result in mental retardation if levels of a certain amino acid get too high? • Cystic fibrosis • Down syndrome • Huntington's disease • Phenylketonuria CONCEPT Autosomal Recessive Traits and Disorders How genes are expressed can be influenced by factors outside the body, like diet. What are the resulting phenotypes called? • Penetrance • Pleiotropy • Multifactorial trait • Polygenic trait CONCEPT Polygenic Traits and Pleiotropy Which phase of mitosis follows prophase? • Metaphase • Telophase • Interphase • Anaphase CONCEPT Mitosis A fiber that consists of microtubules and connects chromosomes to the poles of the cells during cell division is called the _. • spindle • centriole • centrosome • centromere CONCEPT Mitosis Cri-du-chat is an example of what kind of genetic mutation? • Deletion • Duplication • Environmental • Translocation CONCEPT Chromosome Structure Changes Which of the following does DNA replication produce? • One molecule with extra DNA, causing the nucleus to divide • New RNA only • New DNA only • Two molecules, each of which is half new and half old DNA CONCEPT DNA Replication Which of the following is true of crossing over? • It occurs in meiosis I. • It increases genetic variability. • It involves the exchange of chromosome segments between homologous chromosomes. • All of the choices are correct. CONCEPT Meiosis and Genetic Variability Which of these is true about a clone? • It is a hybrid version of two different cell types. • It is a white blood cell infected by a virus. • It is a type of cancerous stem cell. • It is a genetic copy of a cell. CONCEPT DNA Technology and Research Edgar and Alice both have blonde hair, which is a recessive trait. But their first child has brown hair. What is the most likely explanation? • Another gene caused the alleles for blonde hair to deactivate. • Blonde hair is not actually a recessive trait. • It's not actually possible for two parents with recessive phenotypes to have a child with a dominant phenotype. One parent has a dominant allele for blonde hair and a recessive allele for brown hair. CONCEPT Punnett Squares