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Svetradugi [14.3K]
3 years ago
15

The dominance pattern of a gene can be determined from the phenotypes of the parents and offspring. In the examples below, assum

e 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.
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.
Biology
1 answer:
vampirchik [111]3 years ago
6 0

a) Complete dominance (purple is dominant over white)

b) Codominance (both alleles A and B are expressed at the same time)

c)  Incomplete dominance (blended heterozygous)

d) Codominance (both expressed)

e) Incomplete dominance (blended heterozygous)

Complete dominance refers to Mendelian inheritance; when two different alleles are in heterozygous only one  hat is dominant to another will be expressed in phenotype.

Incomplete dominance is when the phenotype of a heterozygous organism is a blend between the phenotypes of two homozygous (heterozygous is an intermediate).

Codominance is another example of non-Mendelian inheritance: both alleles are simultaneously expressed in the heterozygote.

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