Trisomy 21 is a genetic disorder that occurs when a patient has three copies of chromosome 21 in each cell. Which mutation would MOST likely result in a similar phenotype as trisomy 21? A.
inversion of the distal portion of chromosome 21

B.
duplication of the distal portion of chromosome 21

C.
insertion of the distal portion of chromosome 21 to chromosome 5

D.
translocation of the distal portion of chromosome 21 to chromosome 5

Asap timed! 1. ice core samples from glaciers ice caps contain bubbles of ancient atmosphere that are in layers based on age. what questions are scientists most interested in? a. how the amount of water vapor needed to make the ice has changed b. how the amount of ozone has changed over time.c. how the amount of ice in each layer has changed over time d. how the amount of carbon dioxide has changed over time 2. what produces milankovich cycles ? a. sunspots ams solar flare on the suns surface b. changes in the earths orbit c. gravitational changes bases on the position of the sun and the moond. cycles of vegetation that result in desert and rainforest conditions

Explain the source of radioactivity in uranium in earth’s crust by which it produces nuclear radiation

Based on the observation that only male crickets produce a song, you hypothesize that a male's song is a form of communication to potential mates. you set up a simple experiment to test this hypothesis. in the laboratory, you place a male snowy tree cricket in enclosure a, which is adjacent to enclosureb. in enclosure b, you place other insects, one at a time, and observe their responses to the male's song. the enclosures are designed so that the two insects being tested cannot see or smell each other, but sound is transmitted from enclosure a to enclosureb.