Exam 5: Genetics and the Development of the Human Brain

 The generation and maintenance of good brain health is less well understood than the mechanisms responsible for disease, especially among older adults.

 In cases of partial dominance, a heterozygous offspring of two homozygous parents will

 During which stage of development do new neurons form connections with other neurons?

 During weeks 3 to 8 of a pregnancy, the developing organism is called a(n)

 Disjunction of the 21st chromosome that can lead to Down syndrome has been found to be related in most cases to

 If a child is born with higher than normal concentrations of neurotrophins, we can assume that

 .Describe the development of the neural tube into bulges or vesicles.

 During meiosis, the process where chromosomes exchange equivalent sections of genetic material is called

 In their study of the heritability of autistic traits among Dutch teens, Rosa Hoekstra and her colleagues were careful to choose participants from a variety of backgrounds and circumstances. Why is careful sampling especially important to studies of heritability?

 An individuals' risk for developing Alzheimer's disease has been found to be ________ educational attainment and adult mental activity.

 Differentiation of the hindbrain occurs along the

 Huntington's disease, a fatal degenerative movement disorder, results from large numbers of codon repeats in the Huntingtin gene located on chromosome 4. This means that the

 In which of the following cells would you NOT find the same deoxyribonucleic acid (DNA) as any of the other trillions of cells in your body?

 Females are much more likely than males to develop conditions influenced by genes that are located on the X chromosome, because they have two X chromosomes instead of one and therefore twice as much opportunity to experience problems with genes on those chromosomes.

 ______ are long, fingerlike extensions extending out from a growth cone.

 Joan has one APOE3 and one APOE4 allele. This means Joan is heterozygous for the APOE gene.

 According to the ______ hypothesis, age-related decreases in brain function may be offset by cognitive resources a person develops.

 Fragile-X syndrome usually occurs as a result of

 A characteristic that results from genes on the X chromosome that are not duplicated on the Y chromosomes is referred to as being

 Research has shown that a person's height is about 81 percent heritable, whereas his or her BMI is about 59 percent heritable. Which of the following is the most accurate interpretation of these findings?