Genetics Exam Questions & 100% Correct Answers

Genetics Exam Questions & 100% Correct Answers Genetics Exam Questions & 100% Correct Answers The link between chromosomes and heredity was demonstrated using ______, and this occurred ______ DNA was identified as the genetic material. - ANSWER- Drosophila; before When a gene is expressed, its DNA sequence is copied into ______, and sometimes translated into ________. - ANSWER- RNA; protein The basic molecular structure of a gene includes: - ANSWER- a promoter, a transcribed region, and a terminator Which of the following is not true about chromosomes and genes? a) each chromosome carries many genes b)two homologous chromosomes will carry different genes c)the lactase gene will be found at the same location on chromosome 2 in every cell in your body d)species with more chromosomes always have more genes - ANSWER- b)two homologous chromosomes will carry different genes d)species with more chromosomes always have more genes The lactase persistence allele: - ANSWER- affects expression of the LCT gene in humans What makes two genes different from each other? - ANSWER- A) they have different DNA sequences B) they are found at different chromosomal locations (loci) C) they assort independently during meiosis D) they may be expressed in different cell types If an individual carries two identical copies (alleles) of the same gene, the individual is said to be ________ . - ANSWER- homozygous A single diploid individual can carry, at most, ________ different alleles of a single gene. - ANSWER- two The "sickle-cell" allele of the beta-globin gene is considered a ________ allele. - ANSWER- loss of function For haplosufficient genes, loss of function alleles are usually ________ to wild type alleles, while for haploinsufficient genes, loss of function alleles are often ________ to wild type alleles. - ANSWER- recessive; dominant