BIOS 103 Exam 3 NIU Questions with Accurate (A+) Answers
Definition of sister chromatids - ✔✔identical copies of the same chromosome
True Breeding - ✔✔all the offspring were the same and exactly like the parent plants
Law of independence - ✔✔the members of one pair of factors separate independently of those of
another pair
Law of segregation - ✔✔Mendel's law that states that the pairs of homologous chromosomes
separate in meiosis so that only one chromosome from each pair is present in each gamete
Phases of mitosis - ✔✔Prophase, Metaphase, Anaphase, Telophase, Cytokinesis
Codominance - ✔✔A condition in which both alleles for a gene are fully expressed. Therefore,
two genotypes are possible for type A blood, and two genotypes are possible for type B blood.
Incomplete dominance - ✔✔A pattern of inheritance in which two alleles, inherited from the
parents, are neither dominant nor recessive. The resulting offspring have a phenotype that is a
blending of the parental traits.
Polygenic Inheritance - ✔✔A group of genes that produces a specific phenotype or trait only
when expressed together; multiple genes
, Sex link - ✔✔only the X chromosomes
Mitosis - ✔✔cell division in nucleus, to get two alike daughter cells
Meiosis - ✔✔only occur in the sex cell (sperm or the egg)
Crossing over - ✔✔A process occurring during meiosis where two chromosomes pair up and
exchange segments of their genetic material. Male is XY, female is XX
4 bases in DNA - ✔✔Adenine: Thymine, Guanine: Cytosine. A:T is weaker than G:C
Anaphase I - ✔✔Meiosis: homologues chromosomes separate. Anaphase separate.
Prophase II - ✔✔Meiosis: Chromosomes condense, and the nuclear envelope fragments.
Telophase I - ✔✔Meiosis: Nuclei become haploid, having received one duplicated chromosome
from each homologous pair
Prophase I - ✔✔Meiosis: Bivalents form, and crossing-over occurs as chromosomes condense;
the nuclear envelope fragments
Definition of sister chromatids - ✔✔identical copies of the same chromosome
True Breeding - ✔✔all the offspring were the same and exactly like the parent plants
Law of independence - ✔✔the members of one pair of factors separate independently of those of
another pair
Law of segregation - ✔✔Mendel's law that states that the pairs of homologous chromosomes
separate in meiosis so that only one chromosome from each pair is present in each gamete
Phases of mitosis - ✔✔Prophase, Metaphase, Anaphase, Telophase, Cytokinesis
Codominance - ✔✔A condition in which both alleles for a gene are fully expressed. Therefore,
two genotypes are possible for type A blood, and two genotypes are possible for type B blood.
Incomplete dominance - ✔✔A pattern of inheritance in which two alleles, inherited from the
parents, are neither dominant nor recessive. The resulting offspring have a phenotype that is a
blending of the parental traits.
Polygenic Inheritance - ✔✔A group of genes that produces a specific phenotype or trait only
when expressed together; multiple genes
, Sex link - ✔✔only the X chromosomes
Mitosis - ✔✔cell division in nucleus, to get two alike daughter cells
Meiosis - ✔✔only occur in the sex cell (sperm or the egg)
Crossing over - ✔✔A process occurring during meiosis where two chromosomes pair up and
exchange segments of their genetic material. Male is XY, female is XX
4 bases in DNA - ✔✔Adenine: Thymine, Guanine: Cytosine. A:T is weaker than G:C
Anaphase I - ✔✔Meiosis: homologues chromosomes separate. Anaphase separate.
Prophase II - ✔✔Meiosis: Chromosomes condense, and the nuclear envelope fragments.
Telophase I - ✔✔Meiosis: Nuclei become haploid, having received one duplicated chromosome
from each homologous pair
Prophase I - ✔✔Meiosis: Bivalents form, and crossing-over occurs as chromosomes condense;
the nuclear envelope fragments
