Multiple Choice
Many genetic disorders, such as albinism, cystic fibrosis, and Tay-Sachs disease, are inherited as simple recessive traits.
29. Heredity
Patterns of Inheritance
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The form of inheritance in which the heterozygous state is expressed as an intermediate is __________.
A
dominant-recessive inheritance
B
polygenic inheritance
C
incomplete dominance
D
multiple-allele inheritance
E
codominance
F
sex-linked inheritance
Verified step by step guidance1
Understand the concept of inheritance: Inheritance refers to the genetic transmission of characteristics from parent to offspring. Different forms of inheritance determine how traits are expressed.
Identify the key term 'heterozygous state': A heterozygous state occurs when an individual has two different alleles for a particular gene, one inherited from each parent.
Recognize the term 'intermediate expression': This refers to a situation where the phenotype (observable trait) of the heterozygous individual is a blend or intermediate of the phenotypes of the homozygous parents.
Define 'incomplete dominance': Incomplete dominance is a form of inheritance where the heterozygous phenotype is intermediate between the two homozygous phenotypes. This means neither allele is completely dominant over the other.
Differentiate from other forms of inheritance: Compare incomplete dominance with other forms such as dominant-recessive (where one allele completely masks the other), codominance (where both alleles are fully expressed), and polygenic inheritance (where multiple genes influence a trait).
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