Bio 101 Exam 2: Questions & Answers on Genetic Disorders and Mutations

Bio 101 Exam 2: Questions & Answers on Genetic
Disorders and Mutations

Which disease results in deformed red blood cells, poor circulation, and anemia? .............. ANSWER
xc xc xc xc xc xc xc xc xc xc xc




..... V V sickle-cell disease xc xc xc




Linked genes generally - .... ANSWER ......... A do not follow the laws of independent assortment.
xc xc xc xc xc xc xc xc xc xc xc xc xc




When you trace the occurrence of a specific characteristic through your past ancestry, you are con
xc xc xc xc xc xc xc xc xc xc xc xc xc xc xc




structing a family - xc xc xc




_ ........ ANSWER
.... V V pedigree xc xc




Which refers to the movement of a piece of one chromosome to another nonhomologous chr
xc xc xc xc xc xc xc xc xc xc xc xc xc xc




omosome? - xc




....ANSWER ...... V A translocation xc xc




What is a reciprocal translocation ? - ....ANSWER .......... Exchange of chromosome segments
xc xc xc xc xc xc xc xc xc xc




between non- xc




homologous chromosomes without gain or loss of genetic material his father, moth xc xc xc xc xc xc xc xc xc xc xc




er, and himself in that order. - ... ANSWER ................................. V• XHY, XHXh,XhY
xc xc xc xc xc xc xc xc xc xc xc xc




In the gene arrangement ABCDEFG breaks and a segment repositions itself so that the segment
xc xc xc xc xc xc xc xc xc xc xc xc xc xc xc




now reads xc




ABEDCFG, what specific kind of mutation has occurred? - xc xc xc xc xc xc xc xc




....ANSWER ..... '
• • Inversion
xc




Many genetic disorders of humans are caused by - ...ANSWER ...........VArecessive alleles
xc xc xc xc xc xc xc xc xc xc xc




Which refers to the addition of an extra segment of a chromosome? - ...ANSWER ............ V
xc xc xc xc xc xc xc xc xc xc xc xc xc




duplication
Parents who do not have cystic fibrosis (recessive) produce a child who has cystic fibrosis. What
xc xc xc xc xc xc xc xc xc xc xc xc xc xc xc xc




are the chances that each child born to this couple will have cystic fibrosis? ..................... ANSWER
xc xc xc xc xc xc xc xc xc xc xc xc xc




...., xc




25%
Dr. Smith's parents have normal hearing. However, Dr.
xc xc xc xc xc xc xc




Smith has an inherited form of deafness. Deafness is a recessive trait that is associated with the abn
xc xc xc xc xc xc xc xc xc xc xc xc xc xc xc xc xc




ormal allele xc




d. The normal allele at this locus, associated with normal hearing, is D. Dr. Smith's parents could h
xc xc xc xc xc xc xc xc xc xc xc xc xc xc xc xc xc




ave which of the following genotypes? - ....ANSWER .....
xc xc xc xc xc xc xc xc




• • Dd and Dd
xc xc xc




Replication of DNA is said to be semiconservative because - ....ANSWER ...........V & each xc xc xc xc xc xc xc xc xc xc xc xc




separated strand serves as a template to make an exact copy. D xc xc xc xc xc xc xc xc xc xc xc




NA ligase binds - .... ANSWER ......... V A nucleotides together
xc xc xc xc xc xc xc xc




Each DNA strand has a backbone that consists of alternating - ....ANSWER ........... V A sugar and
xc xc xc xc xc xc xc xc xc xc xc xc xc xc




phosphate molecules. xc




A transgenic organism has acquired genes from -
xc xc xc xc xc xc xc




....ANSWER ...... V A another species xc xc xc




Most scientists do not consider viruses to be alive because - .... ANSWER .....
xc xc xc xc xc xc xc xc xc xc xc xc xc




• they are unable to repr xc xc xc xc




Downloaded by Jex Jenga () xc xc xc xc