Succession and Genetics Test Review-
Test on Friday, March 27th
1. What are the two ways that traits are inherited?
Through asexual and sexual reproduction
2. What are some examples of inherited traits?
Eye color, blood type, hair color
3. What are some examples of traits that are not inherited?
Hair style and food preference
4. What is the difference between a dominant trait and a recessive trait? How are
they represented when working genetics problems?
Dominant- trait that always show phenotypically, rep. by a capital letter
Recessive- trait that only shows phenotypically when there are 2 recessive traits
together, rep. by a lower case letter
5. What is the difference between homozygous and heterozygous? How are they
represented in genetics problems? Which one is hidden and which one is seen?
Homozygous- two of the same trait- either both dominant or both recessive,
example DD or dd
Heterozygous- one of each- one dominant and one recessive with the dominant
always showing over the recessive- example Dd
6. What is the difference between homozygous dominant and homozygous
recessive? How are they represented in genetics problems?
Homozygous dominant- 2 dominant traits are passed down- DD
Homozygous recessive- 2 recessive traits are passed down- dd
7. Which trait will show when an organism is heterozygous for a trait? (dominant,
recessive or both?)
It will show the dominant trait only
8. If blues eyes are dominant to green eyes, how can 2 blue eyed parents have a
green eyed child?
The parents are heterozygous and passed on the recessive trait to their child.
Example- Bb x Bb = 25 % bb
9. What is the definition of heredity? The passing of genetic information from one
generation to the next.
10. How many copies of chromosome are passed down from parents to offspring?
a. Half
b. all
c. the parents choose
11. What is the difference between asexual and sexual reproduction? How many
parents are found in each and how do the offspring appear? (uniform or diverse)
Asexual- one parent, uniform offspring
Sexual- 2 parents, diverse offspring
12. How could you determine if an organism is a product of sexual or asexual
reproduction? Analyze their genetic material
13. Where are chromosomes found in a cell? nucleus
14. Complete the following practice problems.
Blue eyes are dominant to green. If a male that is heterozygous for blue eyes is
crossed with a recessive female. What would the results be? Both genotype and
phenotype
B
b
b
Bb
bb
Genotype50% Bb and 50% bb
Phenotype-
Bb
b
bb
50% blue and 50% green
15. In peas, blue is dominant to purple. What would the results be of a
crosspollination between a homozygous dominant male and a heterozygous
female? What would the results be? Both genotype and phenotype
B
B
B
BB
BB
Genotype50% BB and 50% Bb
b
Bb
Bb
Phenotype100% blue peas
16. Horns (H) is dominant to no horns (h). If one monster has a genotype of HH and
is crossed with another monster that has the genotype hh, what would the results
be? Both genotype and phenotype
H
h
H
Hh
Hh
Genotype- 100% Hh
Phenotype- 100% horns
h
Hh
Hh
17. What is ecological succession? Name some examples.
After a disruption to an ecosystem, one species of plants of animals replaces another
species until a climax community is reached.
2 types- primary starts with no soil: volcano eruption, landslide
Secondary starts with soil: farmland, vacant lot
18. What types of plants would you see at each level of primary succession- starting
from primary and ending with climax community?
Primary- moss and lichen, then soil, then grass and small shrubs, then small trees
and shrubs, then large trees
19. What types of plants would you see at each level of secondary successionstarting from the first stage and ending with climax community?
Grasses, flowering plants, shrubs, maple trees
20. What is the difference between primary and secondary succession? (starting
point)
2 types- primary starts with no soil: volcano eruption, landslide
Secondary starts with soil: farmland, vacant lot
21. Give an example of a place where primary succession would occur.
Volcano eruption
22. What are some examples of pioneer species? What stage do we find them in?
(beginning or end of succession) moss and lichen beginning of primary