In other projects Wikimedia Commons. Know Your Migraine Triggers. Often one chromosome is smaller, and appears to retain only those genes that are necessary for sex determination. Please note that our editors may make some formatting changes or correct spelling or grammatical errors, and may also contact you if any clarifications are needed. Causes of a Heart Attack Slideshow. Learn More in these related Britannica articles:
Heterogametic individuals are more susceptible to genetic disorders involving the sex chromosome because they receive only one copy of each gene.
Definition of 'sex chromosome'
Additionally, any mutations on the Y chromosome are also inherited by male progeny without any chance of recombination or change. Development of the reproductive organs. Chromosomal disorders In human genetic disease: In most species of animals the sex of individuals is determined decisively at the time of fertilization of the egg, by means of chromosomal distribution. You may find it helpful to search within the site to see how similar or related subjects are covered. When any cell in the body divides, except…. Someone who has one abnormal gene but no symptoms is called a carrier.
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