Somatic cells from an individual with Down syndrome (trisomy 21) have copies of the genes on chromosome 20 and copies of the genes on chromosome 21. See Section 13.3 (Page) . A karyotype showing chromosomes 1-22 plus X and Y chromosomes. For chromosomes 1-22, size and color banding patterns match for each of the two chromosomes in the pair. There are three copies of chromosome 21, which are circled. Chromosome X is significantly larger than chromosome Y.

videntify the dna change shown in the diagram and explain how that change can result in the increased genetic diversity often seen among siblings.identify the dna change shown in the diagram and explain how that change can result in the increased genetic diversity often seen among siblings.

it is either c or d and i know for sure it is not a or b

desert perennials often survive by remaining dormant during dry periods of the year, then springing to life when water becomes available. most annual desert plants germinate only after heavy seasonal rain, then complete their reproductive cycle very quickly.

answer: although many types of viruses can cause a common cold, rhinoviruses are the most common culprit. a cold virus enters your body through your mouth, eyes or nose. the virus can spread through droplets in the air when someone who is sick coughs, sneezes or talks. theres your answer

explanation: