What are the offsprings genotype and what are the phenotypes?

Biology
Tutor: None Selected Time limit: 1 Day

 When there is incomplete dominance between A and A', write out the parental phenotypes and genotypes. Then write out the offspring phenotypes and genotypes as well as the number of each.

Jul 14th, 2015

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Genotypes:

  • AA, homozygous dominant
  • AA', heterozygous
  • A'A', homozygous recessive

Phenotypes:

  • AA & AA', showing dominant allele A
  • A'A', showing recessive allele A'

All options for crosses are as follows:

  • AAxAA: Both parents hom. dom. with phenotypes showing dominant allele A. This would give 4 hom. dom. children like the parents. 
  • AAxAA': One hom. dom. other het., both phenotypes showing dominant allele A
  • AAxA'A': One parent hom. dom. other parent hom. rec., one parent showing phenotype for allele A, other showing allele A'. Children will be 2 hom. dom. and 2 het. all with phenotype dominant allele A.
  • AA'xAA': Both parents het. showing phenotype for allele A. 1 child will be hom. dom. with phenotype for allele A, 2 children will be het. with phenotype for allele A, and 1 hom. rec. with phenotype for allele A'. 
  • AA'xA'A': Both parents het. showing phenotype for allele A. 2 children will be het. with phenotype for allele A. 2 children will be hom. rec. with phenotype showing allele A'.
  • A'A'xA'A': Both parents are hom. rec. showing phenotype with allele A'. All 4 children will be just like their parents. 

Please let me know if you nea case for torture by michale levined any clarification. I'm always happy to answer your questions.
Jul 14th, 2015

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