Meiosis & Genetics Warm-ups
th
Tuesday Jan. 5 2016
1. What is Mitosis? ___________________________________
2. What is Meiosis? ___________________________________
The diagram below shows the cell cycle.
3. Which of the following activities occurs in the G1phase?
a. growth of the cell
b. replication of the DNA
c. formation of the mitotic spindle
d. breakdown of the nuclear membrane
4. Which of the following phases is the first step in mitosis?
a. Prophase
c.. Anaphase
b. Metaphase
d. Telophase
5. Which lists the mitosis phases in the correct order?
a. prophase, metaphase, anaphase, telophase
b. prophase, anaphase, metaphase, telophase
c. telophase, metaphase, anaphase, prophase
d. telophase, anaphase, metaphase, prophase
Block day 1/6-7
1. The diagram to the right shows a cellular process that occurs in organisms. This
process is known as
a. meiosis.
b. endocytosis.
c. mitosis.
d. phagocytosis.
2. Which of the following statements correctly describes meiosis?
a. Cells divide only once during meiosis
b. Meiosis does not occur in reproductive cells
c. The cells produced at the end of meiosis are genetically identical to the
parent cell
d. The cells produced at the end of meiosis contain half the number of
chromosomes as the parent cell
3. Which of the following best describes meiosis?
a. It is carried out in all tissues that require cell replacement
b. It occurs only in cells in the reproductive structures of the organism
c. It happens in all tissues except the brain and spinal cord
d. It is the first stage of mitosis
Monday 1/11
The diagram to the right represents steps in sexual reproduction
1. Which of the following occurs in the step labeled Z?
a. Fertilization
b. meiosis
c. mitosis
d. translocation
The diagram below represents a change in composition of
homologous chromosomes during Meiosis
2. This change is most likely the result of the process of
a. Nondisjunction
c. gene linkage
b. crossing-over
d. polyploidy
3. Which phase in Meiosis has the homologous chromosomes lining up down the middle of the cell?
a. Prophase I
b. Telophase II
c. Metaphase I
d. Metaphase II
e. Anaphase I
Tuesday 1/12
1. The principles of dominance, segregation, and independent assortment were first described by
a. Watson
b. Morgan
c. Mendel
d. Avery
2. According to Mendel’s law of segregation, which of the following statements describes what happens to the alleles of a
gene pair?
a. The alleles are moved to different chromosomes
c. The alleles are separated during fertilization
b. The alleles are mutated in the process of mitosis
d. The alleles are separated during gamete formation
3. Mendel hypothesized that reproductive cells have only one factor for each inherited trait. This hypothesis is supported by the
observation that
a. haploid cells are produced by mitosis
b. diploid cells are produced by mitosis
c. haploid cells are produced by meiosis
d. diploid cells are produced by meiosis
4. What would result if you crossed a Tall plant (TT) with a short plant (tt)?
a. How many would be tall? ________
b. How many would be short? ______
Block Day 1/13-14
This diagram shows a diploid cell with two pairs of homologous chromosomes
1. Due to independent assortment, what is the possible genetic make-up of gametes produced
by this organism?
a. SsTt
b. Ss, Tt c. S, s, T, t
d. ST, St, sT, st
2. In certain breeds of dogs, blindness is due to a recessive allele (b) of a particular gene, and
normal sight is due to its dominant allele (B). What percentage of the offspring of a normal
heterozygous (Bb) dog and a blind dog (bb) would be expected to have normal sight?
a. 0%
b. 25%
c. 50%
d. 100%
3. A healthy individual is a carrier of a lethal allele but is unaffected by it. What is the probable genotype of this
individual?
a. two dominant normal alleles
b. one recessive lethal allele and one dominant lethal allele
c. one recessive lethal allele and one dominant normal allele
AA AA
d. one dominant lethal
Aa
Aa
A partial Punnett square is shown to the right:
4. Which of the following statements describes the parental genotypes that would result in this Punnett square?
a. Both parents are heterozygous.
b. Both parents are homozygous dominant.
c. One parent is homozygous recessive and the other parent is heterozygous.
d. One parent is homozygous dominant and the other parent is heterozygous
Friday 1/15
1. If Black is dominant over blond, what alleles would be used to represent
a. Black ______ or _______
Blond: _________
2. If Green is dominant over purple, then what would the alleles be for a
a. Homozygous green _______
b. Homozygous purple _______
c. Heterozygous green _______
3. If a diploid cell (2n) contains 46 chromosomes than a haploid cell (n) contains how many chromosomes?
a. 46
b. 92
c. 23
d. 6
4. What is an example of a diploid cell? _____________ What is an example of a haploid cell? _______________
In Pea Plants T is the allele for the dominant, tall characteristic; t is the allele for the recessive, short characteristic. Y is
the allele for the dominant, yellow color characteristic; y is the allele for the recessive, green color characteristic. Cross
two pea plants that are heterozygous for both height and seed color. Determine the genotypes of the offspring.
Calculate the phenotypic ratio of the offspring.
5. How many will be tall and yellow? _______
6. How many will be tall and green? _______
7. How many will be short and yellow? ______
8. How many will be short and green? _______