WGU C653 HEREDITY AND GENETICS
PRACTICE TEST 2026 QUESTIONS WITH
CORRECT ANSWERS
◉ what are homologous chromosomes? Answer: Original 2 identical
chromosomes with different alleles before replication
◉ What are tetrads? Answer: Two pairs of sister chromatids bound
together after synapsis.
◉ What is crossing over? Answer: The physical movement of parts of
the chromosome to the other dyad of sister chromatids
◉ How can errors in meiosis lead to abnormal chromosome
numbers? Answer: Missing or extra chromosomes can cause
conditions like Down syndrome
◉ What is a karyotype? Answer: Organized representation of
chromosomes within a cell
◉ What is nondisjunction Answer: Chromosomes fail to separate
completely
, ◉ What happens in mitosis and meiosis II during nondisjuction?
Answer: Sister chromatids are lined up on the metaphse plate,
during telophase and cytokinesis, at least one sister chromatid fails
to spilt
◉ Meiosis I during nondisjunction? Answer: Tetrads along the
metaphse plate during metaphase, then during telophase, tetrads
fail to split
◉ What was mendels experimental approach? Answer: He used pea
plants to study phenotypes and how crosses happen. Using traits
that were not continuous to separate traits into distinct categories.
He experimented and determined self-fertilization and cross-
fertilization to see ratios of phenotypes in offspring.
◉ What is a gene? Answer: Unit of heredity that influences traits
◉ What is an allele? Answer: Different versions of the same gene
◉ What is a genotype? Answer: Allele trait at the gene level
◉ What is a phenotype? Answer: Physical characteristic of the trait
as a result of genotype
PRACTICE TEST 2026 QUESTIONS WITH
CORRECT ANSWERS
◉ what are homologous chromosomes? Answer: Original 2 identical
chromosomes with different alleles before replication
◉ What are tetrads? Answer: Two pairs of sister chromatids bound
together after synapsis.
◉ What is crossing over? Answer: The physical movement of parts of
the chromosome to the other dyad of sister chromatids
◉ How can errors in meiosis lead to abnormal chromosome
numbers? Answer: Missing or extra chromosomes can cause
conditions like Down syndrome
◉ What is a karyotype? Answer: Organized representation of
chromosomes within a cell
◉ What is nondisjunction Answer: Chromosomes fail to separate
completely
, ◉ What happens in mitosis and meiosis II during nondisjuction?
Answer: Sister chromatids are lined up on the metaphse plate,
during telophase and cytokinesis, at least one sister chromatid fails
to spilt
◉ Meiosis I during nondisjunction? Answer: Tetrads along the
metaphse plate during metaphase, then during telophase, tetrads
fail to split
◉ What was mendels experimental approach? Answer: He used pea
plants to study phenotypes and how crosses happen. Using traits
that were not continuous to separate traits into distinct categories.
He experimented and determined self-fertilization and cross-
fertilization to see ratios of phenotypes in offspring.
◉ What is a gene? Answer: Unit of heredity that influences traits
◉ What is an allele? Answer: Different versions of the same gene
◉ What is a genotype? Answer: Allele trait at the gene level
◉ What is a phenotype? Answer: Physical characteristic of the trait
as a result of genotype
