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Name: Class: Date:
(C) Bethany Lau 2016
Parental CluesAnswer each question below.
A true breeding red eyed male fly mates with a brown eyed female fly. Red eyes are dominant over brown eyes.
1. Which allele is dominant?
_____________________________________
2. Write the parent genotypes below.
red eyed male: _____________________
brown eyed female: ________________
A heterozygous tall pea plant is crossed with a short pea plant.
3. Which allele is dominant?
_____________________________________
4. Write the parent genotypes below.
tall plant: _____________________
short plant: ________________
A white flowered pea plant is crossed to a heterozygous purple flowered pea plant.
5. Which allele is dominant?
_____________________________________
6. Write the parent genotypes below.
white flower plant: __________________
purple flower plant: ________________
A true breeding brown bodied male fly mates with a true breeding white bodied female fly. All of their hundreds of progeny are brown bodied.
7. Which allele is dominant?
_____________________________________
8. Write the parent genotypes below.
brown bodied male: _________________
white bodied female: ________________
A heterozygous black dog mates with a yellow dog and half of their puppies are black and half of their puppies are yellow.
9. Which allele is dominant?
_____________________________________
10. Write the parent genotypes below.
black dog: _____________________
yellow dog: ________________
A man with widow’s peak marries a homozygous woman with no widow’s peak. Half of their children have widow’s peak and half of them don’t.
11. Which allele is dominant?
_____________________________________
12. Write the parent genotypes below.
widow’s peak man: __________________
no widow’s peak woman: ____________
A heterozygous man with wet earwax marries a woman with dry earwax.
13. Which allele is dominant?
_____________________________________
14. Write the parent genotypes below.
wet earwax male: ___________________
dry earwax female: _________________
A heterzygous woman with Polydactyl marries a man with normal digits.
15. Which allele is dominant?
_____________________________________
16. Write the parent genotypes below.
Polydactyl woman: __________________
normal digits man: __________________
Two plants with yellow seeds are crossed together. About three quarters of the progeny plants have yellow seeds and one quarter of the progeny plants have green seeds.
16. Which allele is dominant?
_____________________________________
17. Write the parent genotypes below.
yellow seed parent: _________________
other yellow seed parent:
_____________________________________
* Go back through each scenario and highlight the word or phrase that helped you to determine dominance in green.
Name: Class: Date:
(C) Bethany Lau 2016
Parental CluesAnswer each question below.
A true breeding red eyed male fly mates with a brown eyed female fly. Red eyes are dominant over brown eyes.
1. Which allele is dominant?
_____________________________________
2. Write the parent genotypes below.
red eyed male: _____________________
brown eyed female: ________________
A heterozygous tall pea plant is crossed with a short pea plant.
3. Which allele is dominant?
_____________________________________
4. Write the parent genotypes below.
tall plant: _____________________
short plant: ________________
A white flowered pea plant is crossed to a heterozygous purple flowered pea plant.
5. Which allele is dominant?
_____________________________________
6. Write the parent genotypes below.
white flower plant: __________________
purple flower plant: ________________
A true breeding brown bodied male fly mates with a true breeding white bodied female fly. All of their hundreds of progeny are brown bodied.
7. Which allele is dominant?
_____________________________________
8. Write the parent genotypes below.
brown bodied male: _________________
white bodied female: ________________
A heterozygous black dog mates with a yellow dog and half of their puppies are black and half of their puppies are yellow.
9. Which allele is dominant?
_____________________________________
10. Write the parent genotypes below.
black dog: _____________________
yellow dog: ________________
A man with widow’s peak marries a homozygous woman with no widow’s peak. Half of their children have widow’s peak and half of them don’t.
11. Which allele is dominant?
_____________________________________
12. Write the parent genotypes below.
widow’s peak man: __________________
no widow’s peak woman: ____________
A heterozygous man with wet earwax marries a woman with dry earwax.
13. Which allele is dominant?
_____________________________________
14. Write the parent genotypes below.
wet earwax male: ___________________
dry earwax female: _________________
A heterzygous woman with Polydactyl marries a man with normal digits.
15. Which allele is dominant?
_____________________________________
16. Write the parent genotypes below.
Polydactyl woman: __________________
normal digits man: __________________
Two plants with yellow seeds are crossed together. About three quarters of the progeny plants have yellow seeds and one quarter of the progeny plants have green seeds.
16. Which allele is dominant?
_____________________________________
17. Write the parent genotypes below.
yellow seed parent: _________________
other yellow seed parent:
_____________________________________
* Go back through each scenario and highlight the word or phrase that helped you to determine dominance in green.
Answer Key
red tall
RR
rr tt
Tt pp (small p’s)Pp
purple
brown
BB
bb
black
Bb
bb
widow’s peak
Ww
ww
wet earwax
Ee
ee
Polydactyl
Pp
pp
yellow
Yy
Yy
(C) Bethany Lau
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