Biology
2107 Fall, 2023
Quiz
#2
Name:
__________________________ Student
ID #: ____________________
Section
1 A (26 pts).
Please indicate by “circling” the letter that precedes
the most appropriate answer 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. If you
crossed a true-breeding yellow-seed pea plant (AA) with a heterozygous
yellow-seed pea plant (Aa)then you might expect that:
A The offspring
genotypes would be 1 AA : 2 Aa.
B The offspring
genotypes would be 1 Aa : 1 aa.
C The offspring genotypes 1 AA : 1 Aa.
D The offspring
phenotypes would be 1/2 yellow-seed plants
and 1/2 green-seed plants.
E The offspring
genotypes 1 Aa : 1 aa and would be 1/2 yellow-seed
plants and 1/2 green-seed plants
2. 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
3. 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 organisms.
BONUS POINT:
Give an example of one such organism. ___Humans, Holly, Fruit Flies etc._______________________________
4. Which one
of the following examples from the lecture series would best
fit into the category of having “multiple alleles”.
A Hair colour in donkeys
B Shape of
the “purse” in Shepherd’s purse flowers
C ABO blood groups
D Height in humans
E Petal colour in carnations
5. 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.
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 or would not 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 a light microscope
A Early
Prophase I
B Metaphase
I
C Late
Interphase
D Late
Prophase I
E Early
Metaphase
F. Chiasmata aren’t normally
visible in these cells
9. Take a look at the figures on the page below. 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.).
