This biology question covers important biological concepts and processes. The step-by-step explanation below helps you understand the underlying mechanisms and reasoning.
ScanSolve AI Answer
Hey forti, good to see you again. Let's explain the cross between two heterozygous tall pea plants. Genetic Symbols: Let T represent the allele for tallness* (dominant). Let t represent the allele for dwarfness* (recessive). Parental Genotypes: Both parents are heterozygous tall, so their genotype is Tt. Step 1: Parental Cross (P generation) Parents: Tt (Tall) × Tt (Tall) Step 2: Gametes produced by each parent Each parent (Tt) can produce two types of gametes: T and t. Step 3: Punnett Square Diagram We use a Punnett square to show the possible combinations of alleles in the offspring (F1 generation). | | T | t | | :---- | :---- | :---- | | T | TT | Tt | | t | Tt | tt | Step 4: Genotypes of the F1 generation From the Punnett square, the possible genotypes are: TT Tt tt Step 5: Genotypic Ratio The ratio of genotypes is: 1 TT : 2 Tt : 1 tt (1 homozygous tall : 2 heterozygous tall : 1 homozygous dwarf) Step 6: Phenotypes of the F1 generation Based on the genotypes: TT will be Tall* Tt will be Tall* (because T is dominant over t) tt will be Dwarf* Step 7: Phenotypic Ratio The ratio of phenotypes is: 3 Tall : 1 Dwarf This means that for every four offspring, on average, three will be tall and one will be dwarf. Envoie-moi la prochaine 📸