Exam 5: Genetics and the Development of the Human Brain

Neurites growing in the same direction often experience 

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

Cystic fibrosis is a fatal lung condition that results from a recessive gene. If one parent is a healthy carrier for the condition while the other is not a carrier,what is the likely outcome for any children they might have?​ 

Kyle plants a group of seeds in a pot of enriched soil,and provides all the seeds with identical temperature,lighting,and water.When his plants are mature,he notices that they are quite different in height.Which of the following is the best conclusion Kyle could draw from his observations?​ 

A Hebb synapse is one that​ 

An allele that produces a phenotypical trait regardless of whether or not its pair is homozygous or heterozygous is​ 

Many researchers are concerned that the reported similarities among families that adopt children might distort the results of adoption studies that compare environmental and genetic influences. Why is this a valid concern?​

An individual organism's observable characteristics,are known as their​ 

Doctors recommend that those with phenylketonuria adhere to the dietary restrictions associated with this condition throughout their lifetimes.​ 

Cells in the outer layers of the cerebral cortex are the ___________ to begin migrating,and they have the _____________ journey to their final destination.​ 

Which of the following processes does not experience a critical window?​ 

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.​ 

Connective tissue,muscles,blood vessels,and bone develop from which middle germ layer?​ 

When the rostral part of the neural tube fails to close,what disorder typically results?​ 

You were recently introduced to your roommate's sibling.To your surprise,even though the siblings are the same sex,they look nothing alike.Which of the following is the best explanation of this situation?​ 

During early development,the nervous system develops from which outer germ layer?​ 

When variations in a single base are responsible for the difference between two alleles,the resulting condition is known as​When variations in a single base are responsible for the difference between two alleles,the resulting condition is known as 

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

Programmed cell death is known as​ 

According to Robert Friedland (2014),healthy brain activity is associated with all but which of the following activities?