Dihybrid Cross YYRR yyrr P Generation F, Generation YyRr Phenotype: gametes from heterozygous parent yR YR Yr yr F2 Generation YR YYRR YYRR YYRI YyRr Phenotype: 9: 3: 3: yR YYRR yyRR YyRr yyRr Yr YYRI YyRr YYrr Yyrr yr YyRr yyRr Yyrr yyrr Figure 8.10 A dihybrid cross in pea plants involves the genes for seed color and texture. The P cross produces F1 offspring that are all heterozygous for both characteristics. The resulting 9:3:3:1 F2 phenotypic ratio is obtained using a Punnett square. In pea plants, purple flowers (P) are dominant to white (p), and yellow peas () are dominant to green (V). What are the possible genotypes and phenotypes for a cross between PPYY and ppYy pea plants? How many squares would you need to complete a Punnett square analysis of this cross? gametes from heterozygous parent

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Inheritance and Mendelian Genetics

Inheritance means the passing of traits to offspring from parents. These traits could be passed either through asexual reproduction or sexual reproduction. The offspring receives the genetic material from the parents. Mendelian inheritance is a certain biological inheritance that follows the rules and principles laid down by Gregor Mendel in 1865. The initial hypothesis was considered wrong, but other inheritance theories modified the concept of inheritance and thus genetics.