Question

8. The dominance pattern of a gene can be determined from the phenotypes of the parents and offspring. In the examples below, assume that each parent is homozygous for the specific allele and that the progeny are heterozygous. Classify each example as either complete dominance, incomplete dominance, or codominance.

Complete dominance: ___________________________________________________________________

Incomplete dominance: _____________________________________________________________________________

Codominance: _______________________________________________________________________________________

a) A pea plant with all purple flowers and a pea plant with all white flowers produce a pea plant with all purple flowers.

b) A mother with type A blood and a father with type B blood have a daughter with type AB blood.

c) A red snapdragon and a white snapdragon produce a pink snapdragon.

d) A green fish and a yellow fish have mottled green and yellow offspring.

e) A mother with straight hair and a father with curly hair have a son with wavy hair.

Answer 1

QUESTION-1

TYPE	EXAMPLES
Complete Dominance	a) A pea plant with all purple flowers and a pea plant with all white flowers produce a pea plant with all purple flowers.
Incomplete Dominance	e) A mother with straight hair and a father with curly hair have a son with wavy hair. c) A red snapdragon and a white snapdragon produce a pink snapdragon.
Co-dominance	d) A green fish and yellow fish have mottled green and yellow offspring. b) A mother with type A blood and a father with type B blood have a daughter with type AB blood.

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