In pea plants the allele for white flowers is recessive to t

In pea plants, the allele for white flowers is recessive to the allele for purple flowers. Given the following phenotype ratios found in offspring, determine what the parents must have been. Monohybrid crosses with incomplete dominance and co-dominance the red and white alleles for the snapdragon flower color gene exhibit incomplete dominance. When pink flowers were produced from red- and white-flowered parents, earthy geneticists thought this might represent \"blending inheritance, \' where the hereditary Information from one parent melded with the information from the other. Use Punnett Squares to determine the phenotype ratio* in snapdragon offspring from the following crosses, that show that Wending inheritance is not an accurate way to characterize this situation. define the notation (letters) you will use: pink x pink (if blending inheritance were accurate, we would predict that all offspring would be pink) pink x red (if blending inheritance were accurate, we would predict that all offspring would be dark pink)

Solution

Given that purple color phenotype is dominant and white flower is recessive. Let the genotype of purple phenotype is \'W\' whereas white phenotype is \'w\'.

A dominant phenotype is expressed when the genotype is homozygous dominant (WW) , heterozygous dominant (Ww). A recessive phenotype is expressed when the genotype is homozygous recessive (ww) .

Phenotype ratio Parent genotype

A.) 3:1 purple: white flowers Ww X Ww

Genotype of offspring

B.) All white flowers ww x ww

Genotype of offspring. All would be homozygous white

C.) All purple flowers

i.) WW X WW

All the offspring would be homozygous purple.

ii.) Ww X WW

  iii.) WW X Ww

D.) 1:1 purple: white flowers

	W	w
W	WW ( homozygous dominant)	Ww (heterozygous dominant)
w	Ww ( heterozygous dominant)	ww (homozygous recessive)