Down syndrome is a genetic condition resulting from: Question 62Answer a. biological parent's stresses in life. b. the environment surrounding one after they are born. c. an extra chromosome on the 21st chromosome pair. d. an extra chromosome on the 23rd chromosome pair.
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It is a genetic condition that affects physical and intellectual development. Show more…
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48) People with Down Syndrome have A) three of all the chromosomes, including X and Y_ a diploid set of autosomes, but only one sex chromosome: a haploid set of chromosomes, plus one extra of number 21. D) a diploid set of chromosomes, except only one of number 21. E) a diploid set of chromosomes, plus one extra of number 21. 49) Most sex-linked conditions are caused by A) genes that only males have. inheritance of an extra X chromosome- genes on the X chromosome_ proteins that damage the X chromosome E) genes that only females have:
Adi S.
Down's syndrome is caused by abnormalities seen individuals with 3 copies of chromosome 21. Individual II-1 in this pedigree has Down's syndrome and is indicated with a black box. In this family, individuals were also genotyped for the chromosome 21-linked STR marker D21S11 alleles (D21S11-A, DS21S11-B). a. In which parent (mother or father, or either) and which part of meiosis (I or II or either) the nondisjunction occurred in the son with Down's syndrome? (2 points) Answer: b. In which parent (mother or father) and which part of meiosis (I or II) the nondisjunction occurred in the son with Down's syndrome? Explain Answer:
Give the complete descriptive symbol(s) for the chromosome arrangements of the following: A girl having Down syndrome Human geneticists formulated this descriptive symbol, 47, XY+13 based on their studies. a). Explain what happens with the chromosomes. b). Why are chromosome numbers 47 instead of 46? a). What are the genetic changes related to Klinefelter syndrome? b). This syndrome is a chromosomal condition that affects male ( ), female ( ), or both ( ) (choose one correct answer) physical and cognitive development. What is the trisomy? List an example of trisomy. What does a derivative chromosome mean?
Madhur L.
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