Reading Chromosome’s
Analysis Questions:
1. Which parent gave the allele for free earlobes? Mother
2. What is the phenotype of the offspring’s finger hair? Hair present on
fingers
3. Does the offspring have dimples? Yes
4. Which parent caused the offspring to have a widow’s peak? Mother
5. Which parent gave the most recessive alleles to their offspring? Father
6. Which offspring has free earlobes? George
7. What is the genotype of the offspring with attached earlobes? ee
8. Which of Lynda’s parents gave her the allele for widow’s peak? Mother
9. What are George’s genotype and phenotype for widow’s peak?
a. genotype: Ww
b. phenotype: Widow’s peak present
10. Would the widow’s peak be more obvious if the genotype was WW or Ww?
Explain. They would be equally pronounced… two dominant alleles
does not make a trait more obvious.
11. Which offspring would have hair on their fingers? George
12. Which parent gave the allele for smile dimples? Mother
13. Which offspring has two of the same alleles for earlobes? Both
offspring are (George is homozygous dominant & Lynda is
homozygous recessive).
14. Which offspring has two dominant alleles for cleft chin? George
15. Which offspring is two different alleles for two of their traits? Both
(George for widow’s peak & dimples, Lynda for widow’s peak &
cleft chin).
Reading Chromosome’s
Traits
E
h
e
E = free earlobe
H
H = hair on fingers
W
c
D
Chromosome
from mother
Trait
w
C
d
W = widow’s peak
C = cleft chin
D = smile dimples
Gene from
mom
Gene from
dad
Chromosome
from father
Genotype (gene
combination)
Phenotype (physical
trait you see)
Earlobe- E/e
Hair on Fingers- H/ h
Widow’s Peak- W/ w
Cleft Chin – C/ c
Smile Dimples - D/ d
1. Which parent gave the allele for free earlobes? _____________________
2. What is the phenotype (what you see) of the offspring’s finger hair? ____
3. Does the offspring have dimples? ________________________________
4. Which parent caused the offspring to have a widow’s peak? ___________
5. Which parent gave the most recessive alleles to their offspring? _______
father
mother
E
E
H
H
father
Traits
E = free earlobe
H = hair on fingers
w
W
C
d
C
D
George
W = widow’s peak
C = cleft chin
mother
e
e
h
h
w
W
c
d
C
d
D = smile dimples
Lynda
Use the information above to answer the following.
6. Which offspring has free earlobes? _______________________________
7. What is the genotype of the offspring’s with attached earlobes? ________
8. Which of Lynda’s parents gave her the allele for widow’s peak? ________
9. What are George’s genotype and phenotype for widow’s peak?
a. genotype: ___________
b. phenotype: ____________________
10. Which offspring would have hair on their fingers? __________________
11. Which parent gave the allele for smile dimples? ___________________
12. Which offspring has the same alleles for earlobes? _________________
Explain. __________________________________________________
13. Which offspring has two dominant alleles for cleft chin? _____________
14. Which offspring has two different alleles for two of their traits?
__________________ Explain. _______________________________
_________________________________________________________