Sophia Human Biology Milestones 6 (RATED A) Questions And Answers.

Sophia Human Biology Milestones 6 Sophia Human Biology Milestone 6 1 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 f ollowing could be his/her genotype? Ll ll LL Either Ll or ll CONCEPT Punnett Squares 2 How genes are expressed can be influenced by factors outside the body, like diet. What are the resulting phenotypes called? Polygenic trait Multifactorial trait Penetrance Pleiotropy CONCEPT Polygenic Traits and Pleiotropy 3 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? 0% 100% 50% 25% CONCEPT X-Linked Traits 4 What is an allele that isn't expressed called? Phenotype Dominant allele Recessive allele Genotype CONCEPT Heredity 5 Which of the following occurs during interphase (G1, S and G2) of the cell cycle? The plasma membrane pinches off to form two separate cells. The cell grows larger and makes copies of DNA to prepare for cell division. DNA condenses into chromosomes. Chromosomes align on the metaphase plate. CONCEPT Mitosis 6 Which of the following statements is true regarding plasmids? Plasmids may be transferred between different species of bacteria. Plasmids are circular molecules of DNA. Plasmids are sites for inserting genes for amplification. All of the answer choices are correct. CONCEPT DNA Technology and Research 7 What has to occur for a person to inherit an autosomal recessive trait? One parent must contribute a recessive allele while the other contributes a dominant allele. Both parents must contribute dominant alleles. One parent must contribute a recessive allele. Both parents must contribute recessive alleles. CONCEPT Autosomal Recessive Traits and Disorders 8 Which of the following does DNA replication produce? New RNA only New DNA only Two molecules, each of which is half new and half old DNA One molecule with extra DNA, causing the nucleus to divide CONCEPT DNA Replication 9 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? Blonde hair is not actually a recessive trait. Another gene caused the alleles for blonde hair to deactivate. 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 10 What is the pinched region called where two sister chromatids are joined together? Centriole Centromere Chromosome Centrosome CONCEPT Mitosis 11 Which of the following is true of crossing over? All of the choices are correct. It increases genetic variability. It involves the exchange of chromosome segments between homologous chromosomes. It occurs in meiosis I. CONCEPT Meiosis and Genetic Variability 12 Which of the following is true for homologous chromosomes? We receive one from each parent. They contain the same set of genes, and are the same length and shape. We receive both from one parent. They contain different sets of genes, and are different lengths and shapes. We receive two from each parent. They contain the same set of genes, and are the same length and shape. We receive one from each parent. They contain different sets of genes, and are different lengths and shapes. CONCEPT Structure of DNA and Chromosomes 13 Which of these chromosome abnormalities results in multiple sets of the same sequence of nucleotides? Duplication Deletion None of these Translocation CONCEPT Chromosome Structure Changes 14 The final phase of translation, called termination, is signaled by three nucleotides, called a __________, that mark the end of a polypeptide chain. stop codon intron plasmid exon CONCEPT Protein Synthesis, Part 2: Translation 15 To date, which of these has been used largely in creating clones? RNA sequencing Metabolic profiling Recombinant DNA technology Protein mapping CONCEPT DNA Technology and Research Show Less