Genetic+Terms

Terms and Mendel's Experiment 0 Traits are characteristics seen in organisms. 1 Parent Generation – Purebred tall crossed with a purebred short. 2 Tall and short are the traits. 3 Organisms have two genes for each trait, one from each parent. 4 Genes are the DNA code for a trait. 5 Genes don’t blend in that tall crossed with short don’t produce medium height pea plants. 6 Genes for a trait are called alleles, for example tall and short alleles. 7 One allele will produce a trait over another. 8 The trait express or seen in the organism is produced by the dominant allele. 9 The trait not seen in the organism is carried by the recessive allele. 10 D & R is why genes for traits not seen still exist and are carried by the organism. 11 Purebreds have two identical alleles and received one from each parent. 12 Capital letters are used to indicate dominant alleles. 13 Lowercase letters are used to indicate recessive alleles. 14 . The trait an organism shows is its phenotype for example tall or short. 15 The alleles an organism has is its genotype, for example TT, tt, or Tt. 16. Organisms with two identical alleles are called homozygous. 17. Organisms with two different alleles are called heterozygous. (ANSWER THE FOLLOWING ITEMS for credit.) 18. The phenotypes of the parent generation are... 19 The genotypes of the parent generation are... 20. The phenotype of the F1 or 1st gen is... 21. The genotype of the F1 or 1st gen is... 22. The ...... phenotype disappeared in the F1 generation? 23. The phenotypes present in the F2 or 2nd generation are... 24 The genotypes present in the F2 gen are... 25 F2 phenotype ratio is... 26 F2 genotype ratio is...
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end.................................................................................................................................................................. old Genetic Terms Copy and Complete (Copy only = 50% / Answers only 25%) 1. A purebred tall plant and purebred short plant were crossed in the …… generation. 2. The physical appearance or visible traits shows an organisms … 3. The phenotypes of the parent generation are … 4. Different forms of a gene are called… Organism have two copies of every gene, so they also have two …… for every trait. 5. A recessive allele’s phenotype doesn’t show when the plant also has a …… allele. 6. In the parent generation the purebred tall plant has only …… alleles and the short plant has only ….. alleles. 7. A organism that has two different alleles for a trait is called a ……, but an organism with only one kind of allele is a …… 8. A …… allele is represented by a capital letter, while a …… allele is represented by a lowercase letter. 9a. The symbols “……” would represent a purebred organism with a dominant trait. b. The symbols “……” would represent a purebred organism with a recessive trait. c. The symbols “……” would represent a hybrid organism with the dominant phenotype. 10a. An organism’s genotype is indicated by …… 10b. An organisms that is homozygous has …… identical alleles for a trait, while heterozygous organisms have …… alleles for a trait. 11. The symbols “……” would represent a homozygous organism, while the symbols “……” represents a heterozygous organism. 12. The …… generation gets one dominant allele from the purebred tall parent and one recessive allele from the purebred short parent making them …… or a …….