Biology 2107 Spring, 2023
Quiz #2
Name: __________________________ Student ID #: ____________________
Section 1 A (24 pts).
On the Microsoft Word answer sheet provided, please indicate the letters that precede the most appropriate answer(s) to the question asked. Be aware, there is only one answer to each question, if there are more than one plausible answers, choose the one that is most specific to the question asked.
1. The term “Dioecious” refers to:
A The number of chromosomes in a bacterial cell
B Having the male and female reproductive organs exhibited by the same individual organism
C Bacteria with two membranes… i.e Gram Negative bacteria
D A genetic unit of hereditary
E The genetic complexity of a Mendelian type cell
F A general term for a cell going through the first stage of Meiosis
G Having the male and female reproductive organs in separate individuals.
2. If you crossed a true-breeding yellow-seed pea plant (AA) with a heterozygous yellow-seed pea plant (Aa), offspring would be:
A The genotypes would be 1 AA : 2 Aa.
B genotypes would be 1 Aa : 1 aa.
C genotypes would be 1 AA : 1 Aa.
D phenotypes would be 1/2 yellow-seed plants and 1/2 green-seed plants.
E genotypes would be 1 Aa : 1 aa and would be 1/2 yellow-seed plants and 1/2 greenseed plants
3. What is meant by the term “test cross”
A The cross fertilization of an ovum with a spermatozoa
B A cross that checks whether or not individuals from two different species are compatible.
C A cross that checks whether or not individuals from the same species are compatible.
D A cross between a true breeding strain for a particular trait under scrutiny and a wild-type for the given trait.
E A cross between an individual and another individual that is a homozygous recessive for the particular trait under scrutiny
4. Mendel’s 1st law states that:
A During gamete formation the segregation of one gene pair is independent of all other gene pairs
B Two members of a gene pair segregate from each other into the gametes, whereby one half of the gametes carries one of the traits, the other half carries the other
C The union of one gamete from each parent to form a resultant zygote is random with respect to that particular characteristic.
D Like all things biological, genes come in pairs.
E When fertilization occurs, the zygote gets one half of its chromosomal set from each parent, thus restoring the pair.
5. Which one of the following examples from the lecture series would best fit into the category of having “multiple alleles”.
A Hair colour in horses
B M and N blood groups
C Shape of the “purse” in Shepherd’s purse flowers
D ABO blood groups
E Height in humans
F Petal colour in carnations
6. A mother of four (2 girls and 2 boys) exhibits a recessive X-linked trait. Assuming that the father does not, what is the most likely outcome for their offspring (according to your knowledge of genetics and the laws of probability).
A All the offspring exhibit/show the trait.
B Both boys would appear to be wild-type.
C None of the girls would exhibit the trait
D None of the offspring would exhibit the trait.
E One of the girls would be a carrier, while the other would exhibit the trait. F One of the boys would exhibit the trait, while the other would not.
7. A trait is said to be “pleiotropic” when.
A It defines a phenotype that is highly variable
B it has more than three loci
C it is found in two different species
D it gives rise to more than one phenotype
E it masks the expression of other genes
8. During which phase of Mitosis are chiasmata visible under the under the light microscope
A Early Prophase I
B Metaphase I
C Late Interphase
D Late Prophase I
E Early Metaphase
F. Chiasmata can’t normally be visualized in these cells
9. Take a look
at the figures on the following page.
Using the information given as well as your knowledge of the course thus
far, answer the question(s) that relates to each by circling the MOST
appropriate answer. (Each part of the question is worth 2 pts.).
(a) The cell is in: A Prophase II D Metaphase II
B Anaphase E Anaphase I.
C Metaphase F Telophase I.
