3.19a P1xP1 Cross

Individual gene = 2 alleles

1.  Cross homozygous red petal plant x white petal plant.
2. Allele key R-red r-white R>r
3. Parental phenotype red petal plant x white petal plant
4. Parental Genotype is homologous pair of chromosomes RR x rr
5. This process is meiosis and production of gametes
6. Random fertilisation

	r	r
R	Rr	Rr
R	Rr	Rr

offspring genotype Rr
offspring phenotype all red F1=all Rr  (Heterozygous)