Monday, January 30, 2012

10pts!!!for these Question~!! A lot word~~~please!>"<?

here was the Question



1.a)what is the difference between complete and incoplete dominance?

b)what is Codominance?



2.imagine that you have two pure lines for each of three species of plants. For each species, one pure line produces only blue flowers and the other pure line produces only red flowers. You do a series of crossing experiments on each species. For species #1, you find that the flowers of the F1 offspring are all blue. the flowers of the F1 offspring of species #2 have a mottled red and blue appearance. For species#3, the F1 offspring all have purple flowers



a)In which of these species are the two alleles for flower colour condominant?

b)In which species is one flower-colour alleles for completely dominant over the other

c)Which species displays incomplete dominance for the flower-colour alleles?



3.a)Can an individual ever possess more than two alleles for a particular gene?

b) Can there be more than two alleles for a particular gene present in a population



help!!!!

10pts!!!for these Question~!! A lot word~~~please!%26gt;"%26lt;?
1a. Complete dominance: When one allele completely dominates another. Like Rr (R=red, r=white), the phenotype will be red. Incomplete dominance: When both alleles are equally expressed. Like with Rr (R=red, r=white), the phenotype will be pink. R codes for production of pigment. r codes for no production of pigment. So when they come together, a medium amount of pigment is produced.

1b. Codominance: When both red and white are present in the phenotype (like co-existing)



2a. Species 2 has codominance

2b. Species 1 has complete dominance

2c. Species 3 has incomplete dominance



3a. Yes. Polygenic inheritance: When multiple alleles influence a genetic trait (hair color, eye color, etc)

3b. Yes. Same as above





I'm pretty positive about the first two questions, not so much about the last one though.
Reply:heres my answer: ............. I don't know but seeing i answered your question and its really really hard you should give me the ten points! : )


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