UNIT 6 TEST REVIEW
1.
Inherited
Gene
Environmental
Condition
Final
Appearance
A
Light
Green
B
Light
White
A
Dark
White
B
Dark
White
Look at the chart. It describes the genes of
tomato plants and how the environment may
affect the final appearance. What gene
seems to be influenced by the environment?
2. In lady bugs, a single gene
determines the bugs markings. The
pattern allele is dominant to the plain
allele. A plain lady bug is crossed
with a patterned lady bug. The
patterned lady bug is homozygous
dominant. What percentage of the
offspring from this cross are
expected to be patterned?
3. Define homozygous.
4. Define heterozygous.
5. Define genotype.
6. Define phenotype.
TT Tt
Tt
tt
7. What parents most likely produced
the offspring shown in the punnett
square?
8. How many chromosomes do humans
have?
9. How many chromosomes do you get
from your mother?
10. How many chromosomes do you get
from your father?
11. In fruit flies, the gene for eye color is
located on the X chromosome. The
red eye allele (R) is dominant to the
white eye allele (r). A female fly
with genotype XRXr is mated with a
male fly with genotype XRY. What
are the possible percentages of the
genotypes of their offspring?
12. Can a person with AB blood type
produce a child with O blood?
13. A parent with blood type A and a
parent with blood type B have kids.
What are the possible blood types of
their kids?
14. X-linked traits are usually more
common in males than females,
why?
15. If a mutation occurs on the DNA,
what could occur with the mRNA
and then the protein that gets
produced?
16.
This is a
reproductive cell of a parent. What
are the possible combinations of
alleles this parent could give to their
offspring?
17. What two things does a karyotype
show?
18. B=black fur, b=white fur, S=short
hair fur, s=long hair fur. Cross a
parent that is heterozygous for both
traits with a parent that homozygous
recessive for both traits. What
percentages of their offspring would
be white and long fur?
29.
19.
Using the
gel electrophoresis picture, which
suspect do you think committed the
crime?
20. What is DNA Fingerprinting?
21. Why is DNA fingerprinting used?
22.
Using the clues from the key,
determine the genotype of all the
individuals in the pedigree above.
23. How many males in the pedigree
above have attached earlobes?
24. How many females in the pedigree
above have attached earlobes?
25. What does the word haploid mean?
26. What does the word diploid mean?
27. What does “2n” and “n” mean?
28. In what types of cells does meiosis
occur?
What
process is shown in this picture?
30. What is crossing over?
31. When does crossing over occur?
32. Why does crossing over occur?
33. How are the daughter cells in mitosis
different from the daughter cells in
meiosis?