Genetics

Question 1

what noninvasive imaging procedure is used to determine some aspects of fetal development?

Answer 1

ultrasound imaging is used to determine some aspects of fetal development (fetal age for example) and is non evasive.

Question 2

which fetal testing procedure depends on analyzing amniotic fluid?

Answer 2

amniocentesis analyzes chemicals and cells in amniotic fluid.

Question 3

what is the source of the genes that confer extranuclear inheritance?

Answer 3

maternal mitochondrial DNA confers extranuclear inheritance

Question 4

what process labels genes as paternal or maternal?

Answer 4

Genomic imprinting labels genes as maternal or paternal

Question 5

which of the following may alter gene expression? Other genes, measles in a pregnant woman, lack of key nutrients in the diet.

Answer 5

Other genes, measles in a pregnant woman, and lack of key dietary nutrients all may alter gene expression.

Question 6

how do you explain why parents of average height can produce very tall or very short offspring?

Answer 6

Height is an example of a trait conferred by polygene inheritance in which several genes on different chromosomes contribute to the trait. Such traits show a distribution of phenotypes that yields a bell-shaped curve,