From a cross between dihybrid individuals, whose diallelic genes code for one trait each, expressing complete dominance, the phenotypic ratio is B) <em>9 green-inflated : 3 green-constricted : 3 yellow-inflated :1 yellow-constricted.</em>
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<em>Since I do not have the cross, I will assume the cross involves two dihybrid individuals by looking at the options.</em>
So, let us picture the situation,
- Two diallelic genes code for one trait each, color and inflated/constricted pods.
- G allele is the dominant and codes for green pods
- g allele is recessive and codes for yellow pods
- I is the dominant allele and codes for inflated pods
- i is recessive and codes for constricted pods
- These genes are not linked
1st Cross) Two h0m0zyg0us individuals
Parental) GGII x ggii
F1) 100% GgIi
2nd Cross) Selfcross between F1 individuals
Parentals) GgIi x GgIi
Gametes) GI, Gi, gI, gi
GI, Gi, gI, gi
Punnett square) GI Gi gI gi
GI GGII GGIi GgII GgIi
Gi GGIi GGii GgIi Ggii
gI GgII GgIi ggII ggIi
gi GgIi Ggii ggIi ggii
F2) Genotype
- 1/16 GGII
- 2/16 GGIi
- 1/16 GGii
- 2/16 GgII
- 4/16 GgIi
- 2/16 Ggii
- 1/16 ggII
- 2/16 ggIi
- 1/16 ggii
Phenotype
- 9/16 G-I- ⇒ Green and Inflated
- 3/16 G-ii ⇒ Green and constricted
- 3/16 ggI- ⇒ Yellow and inflated
- 1/16 ggii ⇒ Yellow and constricted
Phenotypic ratio 9:3:3:1
<u>Options</u>
<u />
A) 9 yellow-inflated : 3 yellow-constricted : 3 green-inflated: 1 green-constricted ⇒ NOT CORRECT
B) 9 green-inflated : 3 green-constricted : 3 yellow-inflated : 1 yellow-constricted ⇒ <u>CORRECT</u>
C) 9 green-constricted : 3 green-inflated : 3 yellow-constricted : 1 yellow-inflated ⇒ NOT CORRECT
D) 9 yellow-constricted : 3 yellow-inflated : 3 green-constricted : 1 green-inflated ⇒ NOT CORRECT
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Related link: brainly.com/question/1185199?referrer=searchResults
brainly.com/question/12541734?referrer=searchResults
