AP BIOLOGY

HEREDITY

MONOHYBRID CROSS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What is codominance?
A
A trait where one trait is dominant and the other is reccesive
B
A trait where neither traits are dominant
C
A trait where both traits a reccesive
D
A trait where both traits are dominant
Explanation: 

Detailed explanation-1: -Codominance, as it relates to genetics, refers to a type of inheritance in which two versions (alleles) of the same gene are expressed separately to yield different traits in an individual.

Detailed explanation-2: -Codominance occurs when both alleles show dominance, as in the case of the AB blood type (IA IB) in humans.

Detailed explanation-3: -If both alleles are dominant, it is called codominance?. The resulting characteristic is due to both alleles being expressed equally. An example of this is the blood group AB which is the result of codominance of the A and B dominant alleles.

Detailed explanation-4: -It occurs when both the alleles of a gene lack dominant and recessive relationships and both are observed phenotypically to the same degree. The phenotypic effect of each allele is observable in the heterozygous condition.

Detailed explanation-5: –Codominance is the condition where neither allele can mask the expression of the other, that is, neither allele is completely dominant, hence they are both expressed together.-It is a heterozygous condition in which both alleles at a gene locus are fully expressed in the phenotype.

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