BIOLOGY FAMILY TREE PRESENTATION

Color difference is not observed in every individuals in every generation. It is not sex linked.

 

Hair color

 

uThis is sex linked because at least on individual in the family has the same hair color as that of their parent.

 

Dominant hand

 

uThis trait is recessive and it is not sex linked. The trait is not observed in all the generations.

 

Height

 

uHeight is a sex linked gene in the Bushes’ family. This is a dominant gene.

 

Widows’ peak

 

This is a recessive trait which is not sex linked.

 

Hitchhiker’s thumb

It is not observed in every generation. This  is  a recessive gene that is not sex linkedvuColor difference is not observed in every individuals in every generation. It is not sex linked.

 

Hair color

 

uThis is sex linked because at least on individual in the family has the same hair color as that of their parent.

 

Dominant hand

 

uThis trait is recessive and it is not sex linked. The trait is not observed in all the generations.

 

Height

 

uHeight is a sex linked gene in the Bushes’ family. This is a dominant gene.

 

Widows’ peak

 

This is a recessive trait which is not sex linked.

 

Hitchhiker’s thumb

It is not observed in every generation. This  is  a recessive gene that is not sex linkedMen can only inherit Y linked traits because they are the one who inherit the Y chromosomes. X linked traits can be inherited by both males and females because both of them inherit the X chromosomes. X liked recessive chromosomes that are not linked to the female body features are expressed primary in the male phenotype, (Miglani, 2006). .  This is because men only have one chromosome.uA recessive allele on a female X chromosome is normally shadowed by the dominant one.

uThis makes women carriers for X linked traits.
uThey rarely have these expressed in their own phenotypes.
uAbnormal conditions are normally as a result of the many non sex-determining X linked genes, (Bennett, 2011).
u

u Humans have 1098 sex linked X chromosomes and the majority of them code for something else that is not related to the anatomical female traits in the females. These may end up causing a variety of the known human genetic disorders such as hemophilia, dystrophy and others.Bennett, R. L. (2011). The Practical Guide to the Genetic Family History. New York, NY: John Wiley & Sons.

Davis, R. H., & Weller, S. G. (1997). Gist of Genetics: Guide to Learning and Review. Jones & Bartlett Publrs., U.S.

Miglani, G. S. (2006). Developmental genetics. New Delhi: I.K. International.

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