How many Barr bodies will be visible in cells from a person with the karyotype depicted below? 18 10X K )) | If a se }) 76 21 $F 31 a. None. b. One. c. Two. d. Three. e. Four. }}

Karyotyping can be used to reveal the number, size, and form of chromosomes in an actively- dividing cell. This technique can also be used to determine if certain diseases or disorders (e.g., Trisomy 21) are present. O a. True b. False; karyotyping cannot be used to determine the presence of certain diseases/disorders O C. False; information regarding the number, size, and form of chromosomes in an actively-dividing cell can only be determined by using a Punnett Square

Given that II2 has cystic fibrosis, what is the chance that III8 will be a carrier of the CF allele? Please explain. Please note that II7 is FF.

7. Refer to the following karyotype. I a) Identify the sex of the patient: b) Identify the chromosomal disorder: c) Describe what happened during meiosis that would have resulted in this disorder. 2 10 11 12 88 器A 88 13 14 15 16 17 18 88 19 20 21 22 Y

Here is a karyotype made from cancer cells. Which of the following abnormalities can be detected?   A. Translocation   B. Trisomy   C. Monosomy   D. All of the above.

4. Allele specific oligo-nucleotide hybridization is a genetic test used to look for single nucleotide polymorphisms (SNPS) associated with genetic diseases. It uses short sequences of labeled DNA as probes to bind onto either the normal allele or mutated allele in a patient's sample. Given that hemocystinuria is an autosomal recessive disease, use the results from the ASOH test below to determine the GENOTYPE and PHENOTYPE of the newborns born at Henry Mayo Hospital this week. Luis Mina Emma Elias Genotype Phenotype Allele H probe Allele h probe Luis Mina Emma Elias

4. In this pedigree of another family with hemophilia A. If the woman Il-2 has a son, what is the chance that he is affected? II B. If the woman Il-2 has a daughter, what is the chance 1 2 3 4 III that she is affected? -1 C. If the woman Il-2 has 2 sons, what is the chance that neither will be affected? D. What are the chances that the child of II-4 and Il-5 will be affected?

Below is a pedigree for a family into which Individual III-4 has married. He and his spouse, Individual III-3, are visiting a genetic counselor because they are expecting a baby (Individual IV-1). They want to know the chance that the baby will get the autosomal recessive genetic disease seen in Individual II-2. Overall, in the population, the disease is known to affect 1 in 625 individuals in the population to which this family belongs [assume this frequency is the result of random mating so represents f(aa)] I. II. E III. IV. 1 1 2 2 3 1 3 1 4 2 4 5

6.) A form of “homologous recombination" can also occur in somatic cells. a. When might this happen? b. Describe two main differences between the recombination that occurs in meiosis and that which happens in somatic cells. (2-3 detailed sentences.)

An individual with two different alleles at a locus is a(n) Group of answer choices A. clone B. hemizygote C. homozygote D.heterozygote