Nurs 5315 Final Questions With Correct Answers

A married couple presents to your office for genetic counseling. The husband has an autosomal recessive disease and his wife has a heterozygous genotype for the disease. They ask you, What is the chance that our baby will have the disease? Which of the following answers is correct? 25% 50% 75% 100% {Ans: A chromosome is a package of material located inside the cell nucleus which is made of proteins and a single molecule of DNA. There are 23 pairs of chromosomes in each human cell for a total of 46 chromosomes. Chromosomes are separated into two identical sets during mitosis or meiosis. This provides a set of chromosomes to each daughter cell which results from cell division. This process is responsible for the transfer of genetic information to the daughter cells. The first 22 pairs of chromosomes are known as autosomes. The 23rd pair of chromosomes is the pair which contains the genetic information for gender. This pair contains the genetic information which delineates between the male and female genders. Females have two X chromosomes (XX) and males have an XY chromosome pair. Autosomal chromosomes are said to be autologous. This means they do not carry genetic information