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Transcript
Summary: Activity 3 yes The material in the chromosomes of plants and animals that controls the heredity of the organism is called ____________. The DNA molecule is a twisted structure which, when untwisted, resembles a _______________. The sides of the DNA molecule are long threads or strands that are made up of ____________ groups and _____________ groups. In any one strand the ____________groups alternate with the ____________groups. The sugar groups are connected to the phosphate groups in any one strand by ______________ bonds. The rungs of the ladder join a ___________ group on one strand with a __________ group on the other strand. The rungs do not connect the __________ groups of the two strands. The rungs of the ladder are made of four bases. They are designed by the letters ___,___,___, and ____. The four combine in only two ways. A and ___ always go together, and G and ___ always go together. Each pair, A-T and G-C, represents a _________ of the genetic code. The arrangement of the pairs of bases along a DNA molecule forms a _______ of the genetic code. If the arrangement of the words differ from one arrangement, then the words are _____________. Organisms that are identical in their heredity, such as identical twins, are assumed to have (identical/different) ___________ arrangements of the pairs of bases in their DNA molecules. Organisms that are different in their heredity are assumed to have a different genetic ____________. Download Page 1