Download Dragon Traits

Name______________________________________
Dragon genetics:
What are the 4 traits we are observing:
Female Dragon Traits:
Male Dragon Traits:
Do the dragons have to have identical genes to look the same?
Describe the 2 Genotypes (look at what each chromosome shows for each trait)
What do you think this dragon looks like?
What does this dragon look like?
Write a Rule
•Based on what you have observed, explain the rule of inheriting wings:
•Is this rule the same for any of the other traits?
One Different inheritance pattern
•How is the inheritance pattern of the tail different than that of the other 3 traits?
Vocabulary:
•The gene for wings is dominant and the gene for no wings is recessive.
•What does dominant mean?
•What does recessive mean?
•Look back at the slides –
•What does genotype refer to?
•What does phenotype refer to?
How does genotype relate to phenotype?
Guess the Father’s Genes for each trait
Indicating Dominant and Recessive
•We usually use a single letter to indicate any trait:
–Capital letter for the dominant trait
–Lower case for the recessive trait
•Example – for tall or short we might use T for Tall and t for short
•How would you indicate each of the 4 traits we’ve looked at:
Dominant
Recessive
•Wings
•Forelimbs
•Hindlimbs
•Tail
Hetero and Homozygous
•Having the same gene for a trait on both parental chromosomes is homozygous
•Having a different gene for a trait on each parental chromosome is heterozygous
•
This dragon is heterozygous for which trait?
Homozygous for which trait?
Genotype and phenotype?
•What is the genotype for a dragon that is heterozygous for wings?
•What is the phenotype for a dragon that is heterozygous for wings?
What is the genotype for a dragon that is homozygous for no hindlimbs?
What is the phenotype for a dragon that is homozygous for no hindlimbs?
Write the possible genotype for this dragon for each of the 4 traits: