Y-linked traits in humans, Biology

Assignment Help:

Y-Linked traits in humans

Any gene that occurs exclusively on the Y chromosome is said to be holandric and it is not expressed in females. Such a Y-linked gene normally occurs in males and is transmitted only from father to son - holandric inheritance. Only a few Y-linked genes have been identified uptil now. One is the histocompatibility gene, known as the H-Y gene which is present on the short arm of the Y chromosome. Another important Y-linked gene is the TDF gene that codes for testis detprnining factor. This locus plays an important role in primary sex determination.

Another phenotype known to be associated with the Y chromosome is the condition hypertrichosis. The gene concerned with this condition leads to the developnlent of hairy pinna. This phenotype has been observed ill the inhabitants of Australia, Ceylon, Israel, and India.


Related Discussions:- Y-linked traits in humans

Explain difficult feeding and poor growth, Explain Difficult Feeding and Po...

Explain Difficult Feeding and Poor Growth to recognition of congenital heart disease? Difficult Feeding and Poor Growth: The parent of an infant with CHD may complain that the

Why do fats have thermal isolation properties, Why do fats have thermal iso...

Why do fats have thermal isolation properties? Triglycerides are weak heat conductors and in addition they form thick layers of fat tissue when accumulated by the organism. Tha

Explain plain dwellers, Which two of the following changes (a - d) usually ...

Which two of the following changes (a - d) usually tend to occur in the plain dwellers when they move to high altitudes (3,500 m or more)? 1. Enhance in red blood cell size 2

Explain what it does to fluid balance, Caffeine and alcohol both block the ...

Caffeine and alcohol both block the secretion of ADH from the posterior pituitary gland. Explain what this does to fluid balance. Does it make sense to drink caffeine before an ath

Precursors for gluconeogenesis, Glycerol can act as a substrate for glucose...

Glycerol can act as a substrate for glucose synthesis by conversion to dihydroxyacetone phosphate and an intermediate in gluconeogenesis.  In  order  for citric  acid  cycle pyruva

What are the three major types of rna, Q. What are the three major types of...

Q. What are the three major types of RNA? What is meant by heterogeneous RNA? Messenger RNA, or mRNA, transfer RNA, or tRNA, and ribosomal RNA, or rRNA, are the three main type

Can you explain right ventricle enlargement, Q. Can you explain Right Ventr...

Q. Can you explain Right Ventricle Enlargement? The right ventricle (RV) is roughly triangular in shape on the PA view, with a near vertical base - apex axis. When this chamber

What do you mean by dengue, Q. What is dengue? The Dengue, or dengue fe...

Q. What is dengue? The Dengue, or dengue fever, is an epidemic disease in some countries (for instance, in Brazil), and its most dangerous form is hemorrhagic dengue. It is cau

Resource use of biodiversity, Biodiversity is multiple resource based offer...

Biodiversity is multiple resource based offering us a range of products, materials and services. Our survival and well being of man-kind is directly dependent on biodiversity. Biod

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd