5 Written questions
5 Matching questions
- DNA clone:
- a (1) Four homologous chromatids in a bundle in the first meiotic prophase and metaphase. (2) The four haploid product cells from a single meiosis.
- b A characteristic feature of an organism, such as size, color, shape, or enzyme activity.
- c To fertilize eggs with sperms from the same individual.
- d A section of DNA that has been inserted into a vector molecule, such as a plasmid or a phage, and then replicated to produce many copies.
- e An individual organism homozygous for one or more recessive alleles; used in a testcross.
5 Multiple choice questions
- The classical approach to genetic analysis, in which genes are first identified by mutant alleles and mutant phenotypes and later cloned and subjected to molecular analysis.
- An individual organism having a heterozygous gene pair.
- A class of RNA molecules, encoded in the nucleolar organizer, that have an integral (but poorly understood) role in ribosome structure and function.
- A set of correspondences between nucleotide triplets in RNA and amino acids in protein.
- An experimental procedure that begins with a cloned segment of DNA or a protein sequence and uses it (through directed mutagenesis) to introduce programmed mutations back into the genome to investigate function.
5 True/False questions
polygene (quantitative trait locus) → The study of the molecular processes underlying gene structure and function
sex chromosome → One of a pair of sex chromosomes, distinguished from the X chromosome.
cross → Two successive nuclear divisions (with corresponding cell divisions) that produce gametes (in animals) or sexual spores (in plants and fungi) that have one-half of the genetic material of the original cell.
heterogametic sex → The sex that has heteromorphic sex chromosomes (e.g., XY) and hence produces two different kinds of gametes with respect to the sex chromosomes.
testcross → A cross of an individual organism of unknown genotype or a heterozygote (or a multiple heterozygote) with a tester.