Contemporary Issues in Biology Sawey TCU Exam 2 Questions and Answers 2024

Contemporary Issues in Biology Sawey TCU Exam 2 Questions and Answers 2024 chromosomal abnormalities - Answer- -caused by problems with meiosis -gametes have abnormal numbers of chromosomes -offspring inherit extra chromosome or a missing chromosome chromosomal - Answer- down syndrome is an example of a __________ gene disorder amniocentesis - Answer- -used on pregnant women over 35 years of age -performed during weeks 15-17 of pregnancy -a needle is inserted into the amniotic sac -amniotic fluid with fetal cells is removed -a karyotype of the fetal chromosomes is prepared higher - Answer- before age 45, the risk of having a miscarriage due to amniocentesis is _______ than the risk of having a baby with down syndrome lower - Answer- after the age 45, the risk of having a miscarriage dude to amniocentesis is _____ than the risk of having a baby with down syndrome single gene disorders - Answer- correct number of chromosomes, but one of the chromosomes contains a gene that is responsible for the disease single - Answer- cystic fibrosis is an example of a ________ gene disorder cystic fibrosis - Answer- mucus in bronchi is thick, interfering with lung function genotype - Answer- refers to alleles phenotype - Answer- refers to appearance down syndrome - Answer- occurs when 21st chromosome pairs don't separate properly during meiosis-child gets 3 chromosomes of 21st pair single - Answer- hemophilia is an example of a _____ gene disorder hemophilia - Answer- -person lacks the blood proteins for clotting -caused by a sex-linked recessive allele no - Answer- can a male be a carrier of a sex linked disease? 4000 - Answer- about how many human diseases are thought to be inherited? 2000 - Answer- doctors now have genetic tests for over _______ conditions in vitro fertilization - Answer- tests can be run on embryos this way prior to implantation 2 million - Answer- humans are made of about ________ types of proteins