17.5 Codominance and multiple alleles

Question 1

codominance is when..

Answer 1

instead of one allele being dominant and the other recessive, both alleles are equally dominant
both alleles are expressed in the phenotype

Question 2

multiple alleles is when..

Answer 2

there are more than 2 possible alleles

only two may be present at the loci of an individuals homogulous chromosomes

Question 3

example of codominance

Answer 3

snapdragon plant

snapdragon red flowers is crossed snapdragon white flowers =snapdragon with pink flowers

Question 4

how to write about codominance

Answer 4

alleles=different letters
superscripts attached to the letter of the gene (C)
e.g Cr and Cw

Question 5

example of multiple alleles

Answer 5

blood group
three alleles associated with gene I (immunoglobulin gene)
A, B, O

Question 6

alleles Ia, Ib, Io. dominant or recessive?

Answer 6

Ia and Ib co dominant

Io recesive

Question 7

what do the Ia Ib Io alleles code for

Answer 7

different antigens on cell surface membrane of red blood cells