Question

Carnations with red, smooth petals are crossed with carnations with white, rough petals. In the F1, all the petals are pink and smooth. The F1 intercross yields the following F2:3/16 red, smooth6/16 pink, smooth3/16 white, smooth2/16 pink, rough
1/16 red, rough1/16 white, rougha) What are the parental genotypes?b) What are the F2 genotypes and phenotypes?c) What conclusions can be made about the allelic and gene interactions for both the petal color and texture alleles?

Answer 1

Answer:

a) What are the parental genotypes? RRSS and rrss

b) What are the F2 genotypes and phenotypes?

   F2) 3/16 RRSS + RRSs (red, smooth)

     6/16 RrSS + RrSs (pink, smooth)

     3/16 rrSS + rrSs (white, smooth)

     2/16 Rrss (pink, rough)

     1/16 RRss (red, rough)

     1/16 rrss (white, rough)

c) What conclusions can be made about the allelic and gene interactions for both the petal color and texture alleles? For petal color, it occurs incomplete dominance, being R the dominant allele for red and r the recessive allele for white, together expressing pink in heterozygosis. For texture, it occurs complete dominance of the allele codifying for smooth, S, over the allele codifying for rough, s.

Explanation:

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