PLTW PBS 2026 HUMAN BODY SYSTEMS
AND DISEASE REVIEW PAPER ANSWERS
COMPLETE LEARNING PACK
◉ Dominant trait
Answer: A genetic trait is considered dominant if it is expressed in a
person who has only one copy of the gene associated with the trait.
◉ Gene
Answer: A discrete unit of hereditary information.
◉ Genetic Material
Answer: Molecules responsible for heredity and variation of
organisms.
◉ Genotype
Answer: All or part of the genetic constitution of an individual or
group.
◉ Heredity
Answer: The transmission of traits from ancestor to descendant.
, ◉ Homologous Chromosomes
Answer: Chromosomes having the same or allelic genes with genetic
loci usually arranged in the same order.
◉ Karyotype
Answer: A display of the chromosome pairs of a cell arranged by size
and shape.
◉ Meiosis
Answer: The cellular process that results in the number of
chromosomes in gamete-producing cells being reduced to one half
and that involves a reduction division in which one of each pair of
homologous chromosomes passes to each daughter cell.
◉ Mitosis
Answer: A process that takes place in the nucleus of a dividing cell,
involves a series of steps, and results in the formation of two new
nuclei each having the same number of chromosomes as the parent
nucleus.
◉ Mutation
Answer: A rare change in the genetic material, ultimately creating
genetic diversity.
AND DISEASE REVIEW PAPER ANSWERS
COMPLETE LEARNING PACK
◉ Dominant trait
Answer: A genetic trait is considered dominant if it is expressed in a
person who has only one copy of the gene associated with the trait.
◉ Gene
Answer: A discrete unit of hereditary information.
◉ Genetic Material
Answer: Molecules responsible for heredity and variation of
organisms.
◉ Genotype
Answer: All or part of the genetic constitution of an individual or
group.
◉ Heredity
Answer: The transmission of traits from ancestor to descendant.
, ◉ Homologous Chromosomes
Answer: Chromosomes having the same or allelic genes with genetic
loci usually arranged in the same order.
◉ Karyotype
Answer: A display of the chromosome pairs of a cell arranged by size
and shape.
◉ Meiosis
Answer: The cellular process that results in the number of
chromosomes in gamete-producing cells being reduced to one half
and that involves a reduction division in which one of each pair of
homologous chromosomes passes to each daughter cell.
◉ Mitosis
Answer: A process that takes place in the nucleus of a dividing cell,
involves a series of steps, and results in the formation of two new
nuclei each having the same number of chromosomes as the parent
nucleus.
◉ Mutation
Answer: A rare change in the genetic material, ultimately creating
genetic diversity.
