Zork genetics

11,424 views
10,778 views

Published on

Published in: Lifestyle, Health & Medicine
0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total views
11,424
On SlideShare
0
From Embeds
0
Number of Embeds
19
Actions
Shares
0
Downloads
21
Comments
0
Likes
0
Embeds 0
No embeds

No notes for slide

Zork genetics

  1. 1. Cross a heterozygous green skinned zork with a yellow skinned zork. R r r r Rr rr Rr rr What are the phenotypes of the possible offspring? 50% Green skinned 50% yellow skinned
  2. 2. A long time ago, in a galaxy far, far away, a great race of beings lived on a planet called ZORK. The inhabitants were known as Zorkonians. They are made up of 10 basic genes that code for their appearance. Each one of these genes is made up of 2 alleles. With this in mind, there are 1,024 different possible combinations for their appearance! This is called their PH ENOTYPE or their ph ysical appearance. If we look at their genes, there are 59,040 different combinations of the alleles. This is called the GEN OTYPE or gen etic makeup. Remember that we use letters for the alleles that control the genes and one letter, or allele, is inherited from each parent. You will be using Zorks to see how genes are passed on and inherited. You will be using Punnett Squares to do this.
  3. 3. Cross a homozygous two horned zork with a heterozygous two horned zork. H H H h HH HH Hh Hh What are the genotypes of the possible offspring? 50% HH 50% Hh
  4. 4. Cross a heterozygous green haired zork with a heterozygous green haired zork. G g G g GG Gg Gg gg What are the genotypes and phenotypes of the possible offspring? 25% GG (green hair) 50% Gg (green hair) 25% gg (yellow hair)
  5. 5. Cross a green lipped zork with a heterozygous purple lipped zork l l L l Ll Ll ll ll What are the genotypes and phenotypes of the possible offspring? 50% Ll (purple lip) 50% ll (green lip)
  6. 6. Tork, who is homozygous for tall meets Vorkina, who is short. T T t t Tt Tt Tt Tt What are the genotypes and phenotypes of the possible offspring? 100% Tt (tall)
  7. 7. Tork and Vorkina have two children. One is a boy named Torky and the other is a girl named Vorki. Many years later, Torky meets and marries a girl named Morkalina, who is short. T t t t Tt tt Tt tt What are the genotypes and phenotypes of the possible offspring? 50% Tt (tall) 50% tt (short)
  8. 8. Vorki, the daughter, meets a Zork named Spork, who is heterozygous for the tall trait. T t T t TT Tt Tt tt What are the genotypes and phenotypes of the possible offspring? 25 % TT (tall) 50% Tt (tall) 25 % tt (short)
  9. 9. Torky has green hair and Morkalina has yellow hair. They have 4 children and all of them have green hair. g g ? ? Gg Gg Gg Gg What phenotype and genotype must Torky be? Green hair, GG
  10. 10. Spork and Vorki both have 3 eyes e e e e ee ee ee ee What are the genotypes and phenotypes of the possible offspring? 100% ee (3 eyes)

×