Biology Lab 1023 Midterm Latest Update 100% Correct

Biology Lab 1023 Midterm Latest Update 100% Correct What is a gene? - A) A unit of heredity passed from parent to offspring, determining offspring characteristics - B) A type of cell in the body - C) A basic element of proteins - D) A part of the immune system - Explanation: Genes are units of heredity transferred from parents to offspring, influencing offspring traits. Define allele: - A) A form of a gene with only one possibility - B) A protein structure in cells - C) A type of virus - D) A form of a gene with two possibilities - Explanation: An allele is a variant form of a gene, typically with two possible variations. What does 'dominant' mean in genetics? 2 - A) An allele that is usually suppressed - B) An allele that is usually expressed - C) An allele that skips generations - D) An allele that has three forms - Explanation: Dominant alleles are usually expressed in the phenotype when present. What does 'recessive' mean in genetics? - A) An allele that is usually expressed - B) An allele that usually doesn't get expressed - C) An allele that combines with another allele - D) An allele that affects multiple traits - Explanation: Recessive alleles are typically not expressed in the phenotype unless homozygous. Define 'homozygous': - A) Having two different alleles - B) A mix of alleles - C) Having two of the same allele (either dominant or recessive) 3 - D) Having three alleles - Explanation: Homozygous individuals have two identical alleles for a specific gene. What is meant by 'heterozygous'? - A) Having two different alleles - B) Having two of the same allele