What is the purpose of anmiocentesis? Question 11 options: to examine the cells of a developing fetus to look for signs of mutations to examine the cells of a developing fetus to look for chromosomal abnormalities to examine the cells of a pregnant woman to check for chromosomal abnormalities to examine a pregnant woman to see if there will be a problem due to blood type
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A mutation is a change that occurs in our DNA sequence, either due to mistakes when the DNA is copied or as the result of environmental factors. Developing a mutation varies with age and it varies from one person to another. A screening test for mutation can help in identification, it is available between weeks 10 and 14 of pregnancy or even after delivery. The photographs below show the chromosomes of two babies, Baby A Baby B Answer the following questions: 1. Baby B suffers from a chromosome abnormality. Name the condition caused by this chromosome abnormality. Justify your reasoning. 2. Explain the process that happens during meiosis cell division which results in this type of abnormality. 3. Provide two pieces of evidence to explain why baby A and baby B are not identical twins. 4. Develop a logical argument to support that screening tests are beneficial when planning for children.
Sri K.
A karyotype can show if a fetus has chromosomal abnormalities. Name and briefly describe one of the methods used to obtain fetal samples from a pregnant woman. b) Briefly describe one benefit and one risk associated with obtaining samples from the method you described in “a”. c) Briefly explain why a fetus from a pregnant woman over age 35 is more likely to be tested by the method you gave in part “a” than one from a younger woman
Adi S.
a. The first indication of a genetic disease comes from genetic testing done prior to conception. b. There are two methods of obtaining prenatal tests to collect fetal cells. c. Amniocentesis is when a sample of amniotic fluid from the uterus of a pregnant woman is collected by passing a long needle through the abdominal and uterine walls in order to collect fetal cells. d. Chorionic villus sampling is when a sample of fetal cells is collected from the region where the placenta will develop. e. In adults, white blood cells are used for genetic testing. f. Once the DNA has been isolated, geneticists can either look for chromosomal changes or specific alleles that indicate a disease.
Madhur L.
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