Genetics

Edit Answers
12345678910111213141516171819202122232425262728
Across
  1. 2. one of the five bases that form nucleic acids that is always paired up with adenine through two hydrogen bonds only in DNA
  2. 6. Fork the area where the replication of DNA will actually take place.
  3. 7. the composite of an organism's observable characteristics or traits
  4. 9. thread-like structures that contain the genes
  5. 10. genetic makeup of an organism.
  6. 12. a complex of proteins associated with the centromere of a chromosome during cell division, to which the microtubules of the spindle attach.
  7. 15. the main building block of DNA and is found in every nucleotide that makes up the long chain of genetic information.
  8. 16. One member of a pair of genes found at a specific position on a chromosome
  9. 18. the last stage in prophase, in which the nucleolus and nuclear envelope disappear, spindle fibers form, and the chromosomes shorten in preparation for anaphase.
  10. 20. an individual with two identical alleles of a particular gene
  11. 22. the first stage of cell division, before metaphase, during which the chromosomes become visible as paired chromatids and the nuclear envelope disappears.
  12. 24. a type of cell division that results in four daughter cells each with half the number of chromosomes of the parent cell, as in the production of gametes and plant spores.
  13. 25. the resting phase between successive mitotic divisions of a cell, or between the first and second divisions of meiosis.
  14. 26. one of the four main nucleobases found in the nucleic acids DNA and RNA, the others being adenine, cytosine, and thymine.
  15. 27. a type of cell division that results in two daughter cells each having the same number and kind of chromosomes as the parent nucleus, typical of ordinary tissue growth.
  16. 28. a compound structure at the end of a chromosome.
Down
  1. 1. Cells any biological cell that gives rise to the gametes of an organism that reproduces sexually.
  2. 3. a structural unit of a eukaryotic chromosome, consisting of a length of DNA coiled around a core of histones.
  3. 4. Acid a simple organic compound containing both a carboxyl and an amino group
  4. 5. an individual who has two different alleles of a particular gene.
  5. 8. the region of a chromosome to which the microtubules of the spindle attach, via the kinetochore, during cell division.
  6. 11. an important part of DNA and RNA, where it is one of the nitrogenous bases coding the genetic information these molecules carry.
  7. 13. Any of a group of compounds consisting of a nucleoside combined with a phosphate group and constituting the units that make up DNA and RNA molecules.
  8. 14. Polymerase enzymes that synthesize DNA molecules from deoxyribonucleotides, the building blocks of DNA.
  9. 17. the material of which the chromosomes of organisms other than bacteria are composed.
  10. 19. Cells any cell of a living organism other than the reproductive cells.
  11. 20. an enzyme that bind and may even remodel nucleic acid or nucleic acid protein complexes.
  12. 21. the second stage of cell division, between prophase and anaphase, during which the chromosomes become attached to the spindle fibers.
  13. 23. a purine base present in nucleoproteins of cells of plants and animals
  14. 26. an organism's complete set of DNA, including all of its genes.