Complete question:
You will find the complete problem in the attached files, where all the proposed crosses are detailed.
Answer:
1. Which genotype(s) and phenotype for fur length are dominant?
- Genotype: FF + Ff
- Phenotype: Short fur
2. Which genotype(s) and phenotype for fur length are recessive?
- Genotype: ff
- Phenotype: Long fur
Explanation:
Available data:
- F is the dominant allele that codifies for short fur
- f is the recessive allele that codifies for long fur
CROSSES:
1) Test One: If I breed a short fur, FF female with a short fur, Ff male, then I will expect to see what type of offspring?
- all short fur;
- some short and some long fur;
- all long fur offspring.
Cross: FF x Ff
Gametes) F F F f
Punnet square) F F
F FF FF
f Ff Ff
F1) Genotype:
2/4 = 1/2 = 50% FF
2/4 = 1/2 = 50% Ff
Phenotype:
4/4 = 100% Short-fured individuals
2) Test Two: If I breed a short fur, Ff female with a short fur, Ff male, then I will expect to see what type of offspring? Pick 1)
- all short fur;
- some short and some long fur;
- all long fur offspring.
Cross: Ff x Ff
Gametes) F f F f
Punnet square) F f
F FF Ff
f Ff ff
F1) Genotype:
1/4 = 25% FF
2/4 = 1/2 = 50% Ff
1/4 = 25% ff
Phenotype:
3/4 = 75% Short-fured individuals
1/4 = 25% long-fured individuals
3) Test Three: If I breed a long fur, ff female with a long fur, ff male, then I will expect to see what type of offspring? Pick 1)
- all short fur;
- some short and some long fur;
- all long fur offspring.
Cross: ff x ff
Gametes) f f f f
Punnet square) f f
f ff ff
f ff ff
F1) Genotype:
4/4 = 100% ff
Phenotype:
4/4 = 100% long-fured individuals
