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Science Clinic => Biology => Topic started by: mwit1967 on Jan 6, 2021

Title: Congenital deafness in humans is due to the homozygous condition of either or both of the recessive ...
Post by: mwit1967 on Jan 6, 2021

Congenital deafness in humans is due to the homozygous condition of either or both of the recessive genes d or e. Both dominant D and E are necessary for normal hearing. Gene D/d affects the middle ear, while gene E/e affects the inner ear. It does not matter how good the normal inner ear (as indicated by E_) is; if there is something wrong in the middle ear, the individual is unable to hear. The same applies for the other gene. Give the phenotypic results of the following crosses:

(a)	Dd EE ´ Dd EE
(b)	Dd Ee ´ Dd Ee
(c)	dd EE ´ DD ee
(d)	Dd EE ´ Dd ee
(e)	Dd EE ´ DD Ee

Title: Congenital deafness in humans is due to the homozygous condition of either or both of the recessive ...
Post by: cascooper22 on Jan 6, 2021

(a)	3/4 normal, 1/4 deaf
(b)	9/16 normal, 7/16 deaf
(c)	all normal
(d)	3/4 normal, 1/4 deaf
(e)	all normal

Title: Re: Congenital deafness in humans is due to the homozygous condition of either or both of the recess
Post by: Jericha Mae Partoza on Feb 16, 2021

Nice!