3. there is a gene that affects pea pod color and has two alleles: g = yellow and g = green. there is another gene that affects pea pod shape and has two alleles: w = round and w = wrinkled. a. mendel’s original crosses (p generation) would have consisted of what two genotypes? (hint: this is progeny testing) b. list all of the possible gametes produced by these first or original parent plants. c. if the gametes of question “b” are joined, what will the genotype(s) be in the offspring? d. if the individuals of question “c” are crossed with each other. how many genotypes will be possible in the offspring? e. give the phenotypic ratios of the offspring produced in question “d” (do not list the phenotypes again here).

A.Mendel in his experiments used two true breeding plants that only express one particular trait. He would chose plants with different versions of the trait and cross pollinate them. So, in this case, Mendel’ s P generation would be:

P: GGWW  x  ggww

B.The possible gametes produced by these first or original parent plants (GGWW and  ggww genotypes of the parents) are:

GW and gw. When an organism makes gametes, each gamete receives just one copy of the gene, which is selected randomly (Mendel’s law of segregation).

C.If the gametes GW and gw are joined, the genotype in the offspring would be GgWw. This is dihybrid organism because it is heterozygous (have two different allelss, one recessive, one dominant) at two different genetic loci, G and W. The offspring represents the F1 generation.

D.If the individuals with the genotype GgWw are crossed with the individuals with the same genotype (GgWw), the possible gametes are GW, Gw, gW, gw. The possible genotypes for the F2 generation are:  GGWW, GGWw, GgWW, GgWw, GGww, Ggww, ggWW, ggWw and ggww. There are nine different genorypes. The genotypic ratio is 1:2:2:1:4:1:2:2:1.

E.F2 generation of offspring of this dihybrid cross has a 9:3:3:1 phenotype ratio. Mendel did similar experiment with his plants and conluded that the pairs of traits in the parental generation (P generation) sorted independently from one another, from one generation to the next.

they fuse to form they have half as many chromosomes as a somatic cell of the same individual. b

it's not c. i took the quiz and got it wrong. so my best guess is b.

have a great day, and hope this .