Vocabulary
Knowledge
Application
Lab/Inquiry
150
What is a DNA?
Deoxyribonucleic acid, or DNA, is a molecule in the chromosome that contains the cell’s genetic information.
150
Write the complimentary pair of A-G-C.
T-C-G.
150
How many possible gametes can a parent who is heterozygous for each of two traits produce? Explain.
A parent heterozygous for two traits can produce four different types of gametes. This is because each trait can have two alleles, and each allele can be paired with either allele from the other trait, resulting in four possible combinations.
150
A person is described to look more like his mother than his father. Is it possible for a person to have more genes from their mother than father? Explain your answer.
This is not possible. An individual gets 23 chromosomes from mother, and 23 chromosomes from father. An individual may look more like their mother because some genes are dominant over the other and show more. Appearance is also subjective.
300
What is a pedigree?
A pedigree is a genetic family tree showing patterns of inheritance from generation to generation.
300
What happens in the Metaphase of Mitosis?
Spindle fibres move and align the chromosomes in the middle of the cell at the equator.
300
Two parents with blood type A have children. One of the male children claims to be the father of a child with blood type of whose mother is blood type B. Is it possible that he is the father?
It is possible that he is the father. His parents are blood type A, so they could be IAi. Therefore, he could have the i allele. The mother is blood type B so she could be IBi. If they both pass on the i allele, the child would be blood type O.
300
If a human egg cell undergoes non-disjunction once during Meiosis II, what would be the chromosome number of the four daughter cells it produces?
Meiosis I happened normally so the two daughter cells produced would have a normal 23 pairs of chromosomes. Only one of the daughter cells undergo non-disjunction so the other daughter cell will produce two normal daughter cells, each with 23 chromosomes. The daughter cell that undergoes non-disjunction will produce one daughter cell with 22 chromosomes and another cell with 24 chromosomes.
500
What is a Non-disjunction?
Non-disjunction occurs when homologous chromosomes fail to separate correctly during meiosis.
500
What is the difference between Mitosis and Meiosis?
500
If the son is affected and both of the parents are not affected, what Autosomal Gene does it have? Is it Autosomal Recessive or Dominant? Explain why.
The son has Autosomal Recessive. If both of their parents are not affected, and their child is, the parents must be carriers. Since none of his parents have the gene, it cannot be dominant.
500
After Meiosis I, the daughter cells are said to be haploid, but after Mitosis the daughter cells are diploid. Both processes separate chromosomes from one cell into two cells, so why does meiosis I produce haploid cells and Mitosis produces diploid cells?
During mitosis, sister chromatids separate so both cells are still diploid since they both have maternal and paternal chromosomes. During meiosis I, paternal chromatids go to one daughter cell, and maternal chromatids go to the other daughter cell; although these chromatids are not strictly maternal or paternal since crossing over mixed up some genes. Each daughter cell didn't receive one paternal and one maternal chromosome, so they are haploid.