Answer :
dominant trait = T (tall)
recessive trait = t (short)
heterozygous, meaning different, tall pea plant = Tt
short, short being recessive, pea plant = tt
phenotype means physical looks, which is either tall or short
T t
t | Tt tt
t | Tt tt
two Tt & two tt meaning there are 2 tall and two short. therefore,
1:1
recessive trait = t (short)
heterozygous, meaning different, tall pea plant = Tt
short, short being recessive, pea plant = tt
phenotype means physical looks, which is either tall or short
T t
t | Tt tt
t | Tt tt
two Tt & two tt meaning there are 2 tall and two short. therefore,
1:1
Assuming a diallelic gene exhibiting complete dominance, with tall plants being the dominant phenotype and short plants the recessive one, the cross of a heter0zyg0us plant with a short one results in a phenotypic ratio 1:1.
-------------------------------------------
We know that the cross involved a heter0zyg0us dominant tall pea plant and a short pea plant.
We will assume a diallelic gene coding for this trait, and exhibiting complete dominance. This means that the dominant allele completely masks the expression of the recessive allele.
So,
- h0m0zyg0us dominant genotype ⇒ dominant phenotype
- heter0zyg0us genotype ⇒ dominant phenotype
- h0m0zygous recessive genotype ⇒ recessive phenotype
If the heter0zyg0us plant exhibits the dominant phenotype, it means that the allele coding for tall plants in the dominant allele.
So let us say that
- T is the dominant allele that codes for tall plants
- t is the recessive allele that codes for short plant
According to this information, the tall plant is Tt and the short plant is tt.
So let us make the cross,
Cross: tall plant with short plant
Parentals) Tt x tt
Gametes) T t t t
Punnett square) T t
t Tt tt
t Tt tt
F1) Genotype
- 2/4 = 1/2 = 50% of the progeny is expected to be heter0zygous, Tt
- 2/4 = 1/2 = 50% of the progeny is expected to be h0m0zyg0us recessive, tt
Genotypic ratio ⇒ 1:1
Phenotype
- 2/4 = 1/2 = 50% of the progeny is expected to be tall plants
- 2/4 = 1/2 = 50% of the progeny is expected to be short plants
Phenotypic ratio ⇒ 1:1
----------------------------------------
Related link: https://brainly.com/question/3840678?referrer=searchResults
https://brainly.com/question/11552649?referrer=searchResults