This type of inheritance has certain unique characteristics, which include the following In humans, the term often refers to traits or disorders influenced by genes on the x chromosome, as it contains many more genes than the smaller y chromosome X and y are two sex chromosomes that carry alleles at their gene loci These traits that are being transferred from one generation to the next generation are present on autosomes or sex chromosomes, i.e., the x chromosome or the y. Learning objectives by the end of this section, you will be able to do the following In this case, the presence of just one copy of the dominant gene on the x chromosome is enough to express the trait in both males and females
Hemizygosity is observed in the heterogametic sex when a gene is located on a sex chromosome The term describes traits that are inherited via either the x or the y chromosome This inheritance pattern means that a male with the recessive allele will always show the recessive trait, because he only has one copy of the allele. There are two sex chromosomes in each person, one of which is inherited from each parent. A gene on the y chromosome triggers the development of testes, which make male sex hormones (androgens) Interpreting, completing and constructing punnett squares showing the inheritance of human sex chromosomes
