Name
Class
Date
Skills Worksheet
Meiosis
SEQUENCING/ORGANIZING INFORMATION
In the space provided in the figure below, write the letter of the stage of meiosis
from the list below (a–h) that matches each stage in the figure.
1. _________
5. _________
2. _________
6. _________
3. _________
7. _________
4. _________
8. _________
Stages of Meiosis
a. anaphase II
e. telophase II and cytokinesis
b. metaphase I
f. telophase I and cytokinesis
c. anaphase I
g. prophase I
d. metaphase II
h. prophase II
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Science Skills Worksheets
Name
Class
Date
Meiosis continued
In the space provided, write the letter of the description that best matches the
stage of meiosis.
______ 9. metaphase I
______10. prophase II
______11. telophase I
______12. metaphase II
______13. telophase II
______14. anaphase II
______15. prophase I
______16. anaphase I
a. A new spindle forms around the chromosomes.
b. Chromatids remain attached at their
centromeres as the spindle fibers move the
homologous chromosomes to opposite poles of
the cell.
c. A nuclear envelope forms around each set of
chromosomes, the spindle breaks down, and the
cytoplasm divides, resulting in four haploid cells.
d. Chromosomes gather at the poles; the cytoplasm
divides.
e. The nuclear envelope breaks down; genetic
material is exchanged through crossing-over.
f. Chromosomes line up at the equator.
g. Pairs of homologous chromosomes line up at the
equator.
h. Centromeres divide, enabling the chromatids,
now called chromosomes, to move to opposite
poles of the cell.
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Holt Science: Biology
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Science Skills Worksheets
TEACHER RESOURCE PAGE
Cell Transport
Meiosis
PREDICTING
SEQUENCING/ORGANIZING
INFORMATION
1. Thirty grams of substance A will be in
solution on side 1, and 30 g will be in
solution on side 2. Because the membrane is permeable to substance A,
diffusion will take place. Molecules of
substance A will move from the side
of the membrane where they are less
concentrated until equilibrium is
reached.
2. The original 20 g of substance B will
remain in solution on side 1, and the
original 40 g will remain in solution on
side 2 because substance B cannot
pass through the membrane.
3. The water level will be higher on side
2 of the U-tube. As substance A molecules move across the membrane from
side 1 to side 2, there will be more dissolved molecules on side 2 than on
side 1. This will cause water to move
across the membrane by osmosis from
side 1 to side 2.
4. The cells will swell and will take in
water until they and the flask solution
are isotonic.
5. The cells will remain the same size
because the solutions are isotonic.
6. The cells will shrink, and water will
move out of the cells until they and
the flask solution are isotonic.
1.
2.
3.
4.
5.
6.
7.
8.
ANALYZING EXPERIMENTS
1. a. R
i. R
b. R
j. r
c. r
k. R
d. Rr
l. RR
e. Rr
m. Rr
f. r
n. r
g. Rr
o. Rr
h. Rr
p. rr
2. Only one phenotype is present—plants
with round seeds; only one genotype is
present—Rr.
3. There are two phenotypes present—
round seeds and wrinkled seeds. They
are present in the ratio of three with
round seeds to one with wrinkled
seeds.
4. Mendel’s hypothesis is supported by
this analysis. When both the R and r
alleles appeared together, only the
dominant phenotype was expressed
(round seeds).
5. Mendel probably did not observe an
exact ratio of 3:1. These numbers represent probabilities. For example,
there is a 75 percent chance that any
one offspring will have the round phenotype. Assuming Mendel obtained
large numbers of offspring to analyze,
he would have calculated a ratio of
approximately 3:1.
SEQUENCING
b
e
g
a
anaphase
telophase
metaphase
prophase
3
2
4
1
5.
6.
7.
8.
g
a
d
f
c
h
e
b
Genetics
Cell Cycle and Mitosis
1.
2.
3.
4.
9.
10.
11.
12.
13.
14.
15.
16.
9.
10.
11.
12.
13.
14.
15.
16.
g
b
c
f
h
d
a
e
d
h
c
f
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Science Skills Worksheets Answer Key