For which of the following are newborn infants not routinely screened at birth?
A) PKU
B) color blindness
C) imperforate anus
D) congenital hip dysplasia
Answer: B) color blindness
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Biology Chapter 29
- Gene mutations in the sex chromosomes of the human would tend to become visibly expressed ________.
- A couple whose blood types are A (IAi) and B (IBi) may have a child with which of the following blood types?
- Amy's hand was exposed to X rays. A gene in a skin cell of her hand mutated. This mutant gene will ________.
- The main way a recessive allele would be expressed even when only one copy is present would be ________.
- _______ is the most common type of fetal testing.
- Huntington's disease involves ________.
- Which of the following statements is true concerning genetic screening?
- A chromosomal aberration in which part of a chromosome is lost is known as ________.
- Inheritance of stature (height) in humans is probably due to ________.
- An individual who is heterozygous for a particular trait, yet expresses both alleles of that trait, is an example of ________.
- Which of the following is true concerning environmental influence on genetic expression?
- Sex chromosomes of a normal male are ________.
- A woman has blond hair and brown eyes. This statement is best described as indicating ________.
- In meiosis the spermatozoa that are produced are genetically unlike each other and unlike the cell that produces them. This is one reason for the great variation among humans. What causes this effect?
- The reason recessive genetic disorders are more frequent than disorders inherited as dominant is that ________.
- The gene responsible for the condition known as sickle-cell anemia demonstrates ________.
- An example of multiple-allele inheritance is ________.
- Recessive genes are usually expressed in humans only when ________.
- Those characteristics that can be determined on superficial inspection of an individual are known as ________.
- Is genetic diversity due entirely to inherited genes on the sex chromosomes?
- A female infant is born with several hundred oocytes, each one genetically unique. This is due to ________.
- Two alleles expressing exactly the same information for a trait are designated as ________.
- Dominant alleles are so called because under most circumstances they ________.