PLTW BIOMEDICAL SCIENCE UNIT 3 QUESTIONS WITH
ANSWERS #19
Allele - correct answer Any of the alternative forms of a gene that may occur at a given
locus.
Autosome - correct answer A chromosome that is not directly involved in determining
sex, as opposed to a sex chromosome
Chromosome - correct answer Any of the usually linear bodies in the cell nucleus that
contain the genetic material.
Dominant Trait - correct 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 - correct answer A discrete unit of hereditary information
Genetic Material - correct answer Molecules responsible for heredity and variation of
organisms.
Genotype - correct answer All or part of the genetic constitution of an individual or group
Heredity - correct answer The transmission of traits from ancestor to descendant.
Homologous Chromosomes - correct answer Chromosomes having the same or allelic
genes with genetic loci usually arranged in the same order.
Karyotype - correct answer A display of the chromosome pairs of a cell arranged by size
and shape.
Meiosis - correct 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 - correct 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 - correct answer A rare change in the genetic material, ultimately creating
genetic diversity.
Pedigree - correct answer A diagram of a family tree showing the occurrence of
heritable characteristics in parents and offspring over multiple generations.
ANSWERS #19
Allele - correct answer Any of the alternative forms of a gene that may occur at a given
locus.
Autosome - correct answer A chromosome that is not directly involved in determining
sex, as opposed to a sex chromosome
Chromosome - correct answer Any of the usually linear bodies in the cell nucleus that
contain the genetic material.
Dominant Trait - correct 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 - correct answer A discrete unit of hereditary information
Genetic Material - correct answer Molecules responsible for heredity and variation of
organisms.
Genotype - correct answer All or part of the genetic constitution of an individual or group
Heredity - correct answer The transmission of traits from ancestor to descendant.
Homologous Chromosomes - correct answer Chromosomes having the same or allelic
genes with genetic loci usually arranged in the same order.
Karyotype - correct answer A display of the chromosome pairs of a cell arranged by size
and shape.
Meiosis - correct 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 - correct 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 - correct answer A rare change in the genetic material, ultimately creating
genetic diversity.
Pedigree - correct answer A diagram of a family tree showing the occurrence of
heritable characteristics in parents and offspring over multiple generations.
