Sex-limited traits, Biology

Assignment Help:

Sex-Limited Traits

Sex Limited Traits are traits expressed only in one sex, although the genes controlling thcm arc prcscnt as wcll as transmitted to both thc sexes. Therefore, males and femalcs with thc bamc genotype, with rcspcct to a particular locus may have different phenotypes.

Sex-Limited Traits arc determined by autosomal genes, whose phenotypic expression is determined by the presence or absence of one of the sex hormones. Since sex hormones are the limiting factors, rhc phenotypic expression of these genes is limited to onc sex or the other. The most obvious exanlples are the secondary sex characteristics. Beard development in human beings is one such sex-limited character as men have beards, and woman normally do not. Yet studies indicate no significant differences between thc sexes in number of hairs per unit area of skin surface except in their development. This appears to clepend on sex hornlone production. Any disturbance in these hol-rnones in women rnay result in the development of beard. Similarly, the full development of breasts in females, and presencc of prostate glands in males are thc examples of sex-limited traits seen in human beings. Traits like egg laying in chickens, oviposition behaviour in insects are somc other such examples. Milk production in mammals is limited to females, but certain bulls are in great demand among dairy breeders and artificial inscinination associations because their mothers and daughters have incresed milk production records.


Related Discussions:- Sex-limited traits

What are homologous chromosomes, What are homologous chromosomes? Which are...

What are homologous chromosomes? Which are the human cells that do not have homologous chromosomes? Chromosomes have genes (genetic information in the form of nucleotide sequen

Symbolising and language skills, Language, a powerful tool for communicatio...

Language, a powerful tool for communication should have played a very important part in the evolutionary history of human species. Two relevant questions that could be asked of hum

Determine the posterior superior alveolar nerves, Determine the posterior s...

Determine the posterior superior alveolar nerves The anterior, middle and posterior superior alveolar nerves run in the facial wall of the maxillary sinus between its lining me

9 questions in cardiovascular physiology, I have 9 questions in my undergra...

I have 9 questions in my undergraduate cardiovascular physiology class I need help with. It is mostly dealing with slow response action. I need the work in about 2nite hours from n

Which process is called "reverse osmosis", When water containing impurities...

When water containing impurities is forced against a filter that allows only water through, this process is called "reverse osmosis". Why is this a good description of what is happ

Proximal end of his right femur, In Reggie's case, he fractured the proxima...

In Reggie's case, he fractured the proximal end of his right femur, an integral component of his hip. Name the joint disorders that Reggie is more a risk of in (a) the short term a

What happens when the ovum is fertilized, What happens when the ovum is fer...

What happens when the ovum is fertilized? If the ovum is fertilized, there is no breakdown of endometrium and no menstrual flow. The fertilized ovum travels through uterine tub

Anatomic factors in patient selection for mitral valvuloplas, Q. Anatomic F...

Q. Anatomic Factors in Patient Selection for Mitral Valvuloplasty ? The ideal patient is young, has pliable non calcified mitral leaflets, and mild subvalvular disease. TEE may

Fats are essential for meeting nutritional need of essential, Why Fats are ...

Why Fats are essential for meeting nutritional need of essential? Fats are essential for meeting nutritional needs of essential, fatty acids like linoleic acid (n-6) and alpha

Gene therapy vectors, The ultimate aim of somatic gene therapy is to alter ...

The ultimate aim of somatic gene therapy is to alter the genetic material of living cells which involves transfer of DNA. Genetic material is transferred by various methods like us

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