6.1
1. One parent dog has a long body (Bb), while the other parent dog has a
1.
Your genes are inherited from your __________________________.
2.
Various forms of the same gene are called ____________________.
3.
An animal has an allele for white fur, but its fur is black. Is the allele
for white fur is dominant or recessive?
4.
Your eye color is a phenotype or a genotype?
short body (bb). What is the probability that an offspring will have a
short body?
B
b
b
b
2. Both parent dogs have brown eyes (Bg). What is the probability that an
6.2
offspring will have green eyes (g)?
5.
The way in which parents’ alleles might combine in their offspring can
be shown in a ________________________________.
B
g
B
g
6.
In a plant, tall (D) is the dominant allele. Short (d) is the recessive
allele. Which genotype would a short offspring have?
3. One parent dog has curly hair (Cc). The other parent dog has curly hair
(CC). What is the probability that an offspring will have straight hair?
7.
If the genotype of one parent is GG and the genotype of the other is
gg, what is the probability that an offspring will have a Gg genotype?
6.3
8.
What process takes place when a sperm combines with an egg?
______________________
4. One parent dog has a long tail (TT). The other parent dog has a short tail
(tt). What is the probability that an offspring will have a long tail?
9.
Sperm and eggs are produced during _____________________.
10.
DNA is always copied before cell division during ______________.
https://www.youtube.com/watch?v=d4izVAkhMPQ
How are your Genes?
Circle You, Mom, Dad, Siblings who have the dominant and/or recessive
genes for each.
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
Tongue rolling (D)
Detached earlobe (D)
Attached earlobes (r)
Hitchhiker’s thumb (D) (bent backwards)
Dimples (D)
Widow’s peak (D)
Bent little finger (D)
Webbing between fingers (D)
Freckles (D)
Crown whorl-clockwise (D)
Second toe longest (D)
Handedness-Right (D), Left (r)
Hand clasping – left over right (D)
PTC - tasting bitterness (D)
Mid digital hair on fingers (D)
Pigmented irises (G,B,B) (D), blue/gray (r)
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
Sib ________
Sib ________
Sib ________
Sib ________
Sib ________
Sib ________
Sib ________
Sib ________
Sib ________
Sib ________
Sib ________
Sib ________
Sib ________
Sib ________
Sib ________
Sib ________
More Punnett Squares!
17. Your mom has the dominant gene for brown eyes, and her genotype is
BB. Your father has the recessive gene for blue eyes. His genotype is bb.
a. What are the genotypes possible for
eye color for their children?
______________________________
b. What percent or fraction of their
children will have brown eyes?
______________________________
18. Your mom has the recessive gene for no
freckles. Her genotype is ____. Your dad
has the dominant gene for freckles, and his
genotype is Ff.
a. What are the genotypes possible for
freckles for their children?
______________________________
b. What percent or fraction of their
children will have freckles?
______________________________
19. Your mom and dad have the recessive gene
for no dimples. Their genotype is dd.
a. What are the genotypes possible for
dimples for their children?
______________________________
b. What percent or fraction of their
children will have dimples?
______________________________
20. Your mom and dad have the dominate gene
for right handedness. Her genotype is RR and
his is Rr.
c. What are the genotypes possible for
right handedness for their children?
______________________________
d. What percent or fraction of their
children will be right handed?
______________________________
Monohybrid Mice!
Directions: Work each problem showing your work. For each cross, give the
genotypes and phenotypes of the offspring and the probability of getting
each. Answer the questions that accompany each problem. What you need
to know about the mice: In laboratory mice, gray (G) is dominant over albino
(g).
I. Cross a female Gg with a male gg.
III. Cross a gray female, whose father was albino, with a heterozygous male.
14. What is the probability of getting gray offspring? ________
15. What is the probability of getting albino offspring? ________
16. How many possible genotypes are there among the offspring? ________
17. How many possible phenotypes are there among the offspring? ________
18. What is the probability of getting heterozygous offspring? ________
1. What is the probability of getting gray offspring? ______ Albino? _______
2. How many possible genotypes are there among the offspring? ________
3. How many possible phenotypes are there among the offspring? ________
4. What is the probability of getting heterozygous offspring? ________
5. What is the probability of getting homozygous offspring? ________
19. What is the probability of getting homozygous offspring? ________
20. What is the genotype of the female? ________How do you know?
____________________________________________________________
21. What is the genotype of the male? ________How do you know?
____________________________________________________________
6. What color is the female? ________ What color is the male? ________
II. Cross a homozygous gray female with a heterozygous male.
7. What is the probability of getting gray offspring? ______ Albino? _______
8. How many possible genotypes are there among the offspring? ________
9. How many possible phenotypes are there among the offspring? ________
10. What is the probability of getting heterozygous offspring? ________
11. What is the probability of getting homozygous offspring? ________
12. What is the genotype and color of the female? ______________________
13. What is the genotype and color of the male? ______________________
IV. Cross an albino female, whose father was gray, with a gray male, whose
mother was albino.
22. What is the probability of getting gray offspring? ______ Albino? _______
23. How many possible genotypes are there among the offspring? ________
24. How many possible phenotypes are there among the offspring? ________
25. What is the probability of getting heterozygous offspring? ________
26. What is the probability of getting homozygous offspring? ________
27. What was the genotype of the father of the albino female? _________
allele
gamete
dominant genotype
gene
heredity
1.
Punnett square
phenotype
probability
replication
RNA
mutation
ratio
recessive
The likelihood of a specific outcome in relation to the total number of
possible outcomes.
Vocabulary Word
pedigree
selective breeding
genetic engineering
genome
cloning
Description
12. Selective breeding
2.
Compares or shows the relationship between two quantities.
3.
A unit of heredity that occupies a specific location on a chromosome and
codes for a particular product.
4.
The genes an organism has or its genetic constitution.
5.
The allele that is expressed in the phenotype when two copies of it are
present on the homologs
6.
The actual characteristics an organism has
7.
The various forms of the same gene
8.
Illustrates how the parents’ alleles might combine in offspring.
9.
The passing of genes from parents to offspring
10. the allele that is expressed in the phenotype even if it is the only copy
present in the genotype
11. Cells that contain half the usual number of chromosomes – one
chromosome from each pair.
13.
By making copies, this has been used in bacteria
to produce proteins and drugs that help fight
disease such as diabetes.
14. genome
15.
This chart can show the pattern of inheritance
of the sickle-cell allele through three
generations of a family.
16.
This produces two identical molecules of DNA
before the cell divides.
17.
The organism resulting from this process is
referred to as having been genetically modified.
Its DNA was taken, changed, and returned to
the organism.
18. mutation
19.
This is what makes proteins with three different
types :messenger, ribosomal, and transfer.