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Author Question: Trisomy 21, or Down syndrome, occurs when there is a normal diploid chromosomal complement but one ... (Read 90 times)

panfilo

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on: Mar 26, 2020
Trisomy 21, or Down syndrome, occurs when there is a normal diploid chromosomal complement but one (extra) chromosome 21. Although fertility is reduced in both sexes, females have higher fertility than males. Van Dyke et al. (1995; Down Syndrome Research and Practice 3[2]:65—69) summarize data involving children born of Down syndrome individuals. Given the fact that conceptuses with 48 chromosomes (four chromosome 21’s) are not likely to survive early development, what percentage of surviving offspring would be expected to have Down syndrome if both parents have Down syndrome?
◦ Two-thirds of the surviving offspring would be expected to have Down syndrome.
◦ All the children would be expected to have Down syndrome.
◦ None of the surviving offspring would be expected to have Down syndrome.
◦ One-third of the surviving offspring would be expected to have Down syndrome.
◦ One-half of the surviving offspring would be expected to have Down syndrome.
Essentials of Genetics ¦ Klug ¦ 9th Edition
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Marked as best answer by panfilo on Mar 26, 2020

angrybirds13579

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Reply #1 on: Mar 26, 2020
Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
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panfilo

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Reply 2 on: Mar 26, 2020
Wow, this really help

dantucker

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Reply 3 on: Yesterday
Gracias!

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