Genetics

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Across
  1. 3. Dominance a form of intermediate inheritance in which one allele for a specific trait is not completely expressed over its paired allele.
  2. 5. are the smallest chemical parts that form segments of chromosomes. Genes determine what we look like.
  3. 8. Traits a feature or characteristic of an organism that has been passed on to it in its genes
  4. 9. a self-replicating material which is present in nearly all living organisms as the main constituent of chromosomes. It is the carrier of genetic information.
  5. 10. Square a simple graphical method of showing all of the potential combinations of offspring genotypes that can occur and their probability given the parent genotypes.
  6. 11. a genotype consisting of two identical alleles of a gene for a particular trait. An individual may be homozygous dominant (AA) or homozygous recessive (aa). Individuals who are homozygous for a trait are also referred to as homozygotes.
  7. 12. a genotype consisting of two different alleles of a gene for a particular trait. An individual that is heterozygous (Aa) is also referred to as hybrids.
  8. 13. the likelihood that a specific event will occur. Probability is usually expressed as the ratio of the number of actual occurrences to the number of possible occurrences.
  9. 14. is an alternate form of a gene for one trait. For example, brown and blue eyes are two different alleles for eye color. We have 2 alleles for any, one trait, one from our mother and one from our father. They may be the same form of the gene (homozygous) or two different forms (heterozygous).
Down
  1. 1. observed trait of an organism that mask the recessive allele of a trait
  2. 2. the passing on of physical or mental characteristics genetically from one generation to another.
  3. 4. a form of inheritance wherein the alleles of a gene pair in a heterozygote are fully expressed. As a result, the phenotype of the offspring is a combination of the phenotype of the parents.
  4. 6. is the actual code that alleles or genes possess (E.g. Tt or TT or tt). The gene may or may not be expressed when you observe a living organism.
  5. 7. trait of an organism that can be masked by the dominant form of a trait
  6. 10. the observable or detectable characteristics of an individual organism--the observable expression of a genotype.