Question

value: 10
the abo blood typing is an example of ___.
a. polygenic trait
b. codominance
c. incomplete dominance
d. x linked trait

value: 10
mendels principle of segregation is due to ___.
a. meiosis
b. mitosis
c. mutations
d. cleavage furrow

value: 10
if an intermediate phenotype appears in the offspring this is an example of ___.
a. codominance
b. polygenicity
c. incomplete dominance
d. x link trait

value: 10
a carrier of an autosomal recessive disorder, but does not display characteristics of the disorder has a ____ genotype
a. homozygous recessive
b. homozygous dominat
c. heterozygous

Explanation:

1. ABO blood - typing: In ABO blood - typing, both A and B alleles are codominant when present together. So, it is an example of codominance.
2. Mendel's principle of segregation: During meiosis, homologous chromosomes separate, which leads to the segregation of alleles. So, it is due to meiosis.
3. Intermediate phenotype: In incomplete dominance, the heterozygous offspring show an intermediate phenotype between the two homozygous phenotypes.
4. Carrier of autosomal recessive disorder: A carrier has one normal allele and one recessive allele, which is a heterozygous genotype.

Answer:

1. b. codominance
2. a. meiosis
3. c. incomplete dominance
4. c. heterozygous