Download From father From mother

Genetics Quiz 1 – Study sheet/practice quiz #2
Use the chromosomes and key below to answer the following questions:
From father
From mother
d
d
t
T
c
C
H
H
Kelly
r
Q
r
q
Trait
Dimples (D,d)
PTC Taster (T,t)
Hair Curliness (C,c)
Hair Color (H,h)
Handedness (R,r)
Widow’s peak (Q,q)
Recessive
No dimples
Can’t taste
Curly
Blond
Left handed
No widow’s
peak
Dominant
Has dimples
Can taste
Straight
Brown
Right handed
Has widow’s
peak
Write the genotypes and phenotypes for each of Kelly’s traits.
Genotype
Phenotype
1. Hair Color
________
____________________
2. Hair Curliness
________
____________________
3. Widow’s Peak
________
____________________
4. Handedness
________
____________________
5. PTC Taste
________
____________________
6. Dimples
________
____________________
7. Does Kelly’s mom have curly hair? Explain. ________________________________
________________________________________________________________________
________________________________________________________________________
8. Does Kelly’s dad have curly hair? Explain. _________________________________
________________________________________________________________________
________________________________________________________________________
Vocabulary:
______ 1. gene
A. a section of DNA which codes for a trait
______ 2. Allele
B. letter combination to express one’s genes
______ 3. Chromosome
C. different forms of a gene; one from mom, one from dad
______ 4. phenotype
D. a coiled piece of DNA
______ 5. genotype
E. the appearance or behavior of the organism
Define.
Inherited trait - ___________________________________________________________
Acquired Trait - __________________________________________________________
Mark the trait “I” if it is inherited, or “A” if it is acquired.
_______ hitchhiker’s thumb
_______ cleft chin
_______ braces
_______ brown eyes
_______ tattoo
_______ ear piercing
_______ braided hair
_______ height
Genetics Quiz 1 – Study sheet/practice quiz #2 Answer Key
Use the chromosomes and key below to answer the following questions:
From father
From mother
d
d
t
T
c
C
H
H
Kelly
r
Q
r
q
Trait
Dimples (D,d)
PTC Taster (T,t)
Hair Curliness (C,c)
Hair Color (H,h)
Handedness (R,r)
Widow’s peak (Q,q)
Recessive
No dimples
Can’t taste
Curly
Blond
Left handed
No widow’s
peak
Dominant
Has dimples
Can taste
Straight
Brown
Right handed
Has widow’s
peak
Write the genotypes and phenotypes for each of Kelly’s traits.
Genotype
Phenotype
1. Hair Color
__HH__
___Brown___________
2. Hair Curliness
__Cc___
____Straight_________
3. Widow’s Peak
__Qq___
_Has Widow’s Peak___
4. Handedness
__rr____
_Left handed_________
5. PTC Taste
__Tt____
__Can taste___________
6. Dimples
___dd__
__No dimples_________
7. Does Kelly’s mom have curly hair? Explain. __You can’t tell, because you don’t know
what her other allele is. She could be Cc and have straight hair or cc and have curly hair.
________________________________________________________________________
8. Does Kelly’s dad have curly hair? Explain. _ No. He has a dominant allele for straight
hair, so he will definitely have straight hair (regardless of if his genotype is CC or Cc.)
________________________________________________________________________
Vocabulary:
___A___ 1. gene
A. a section of DNA which codes for a trait
___C___ 2. Allele
B. letter combination to express one’s genes
___D___ 3. Chromosome
C. different forms of a gene; one from mom, one from dad
___E___ 4. phenotype
D. a coiled piece of DNA
____B__ 5. genotype
E. the appearance or behavior of the organism
Define.
Inherited trait - ___a trait that is determined by your DNA. _______________________
Acquired Trait - ___ a trait that is not determined by your DNA___________________
Mark the trait “I” if it is inherited, or “A” if it is acquired.
___A____ hitchhiker’s thumb
___I____ cleft chin
___A____ braces
___I____ brown eyes
___A____ tattoo
___A____ ear piercing
___A____ braided hair
___I____ height