New answers tagged

2

Thalassemia is a recessive trait. That means individuals with only one copy of the allele (Heterozygotes) have the "normal" phenotype (they don't have Thalassemia). If an individual is homozygous for the recessive allele they will have Thalassemia. Heterozygotes are often referred to as carriers as they can transmit the allele to their offspring, but do ...


2

The first definition is correct. A sex-linked trait is a trait affected by a locus on a sex chromosome. If you google sex-linked trait, you will find this same definition (not the exact same words) over and over again. The definition of sex-linked trait is NOT restricted to traits that are not unrelated to primary or secondary sexual organs. Any ...


1

Sex linked traits are those controlled by genes on the sex chromosomes, regardless of whether or not they are related to reproduction. This can be the major (e.g. X or Z) or minor (e.g. Y or W) sex chromosomes. "Sex linkage applies to genes that are located on the sex chromosomes. These genes are considered sex-linked because their expression and ...


2

In population genetics, with a simple one-locus two-allele model, we consider the frequency of the two alleles to be $p$ and $q$ where $p + q = 1$ (and thus $1-p=q$ and $1-q=p$). When an allele is recessive it is only expressed at the phenotypic level when the individual carries two copies of the allele. Following from your example, gene $A$ might be ...


1

Issues with the post Sexual selection is a mode of natural selection where members of one biological sex choose mates of the other sex to mate with (intersexual selection), and compete with members of the same sex for access to members of the opposite sex (intrasexual selection). This question has nothing to do with sexual selection. What do you mean by ...


7

Homo sapiens / Homo sapiens sapiens Human being, in the popular culture generally refers to modern humans, called either Homo sapiens or Homo sapiens sapiens. The existence of the two names will make sense when talking about the Neanderthals. In the term Homo sapiens, Homo indicates the genus and sapiens indicates the species. In the term Homo sapiens ...



Top 50 recent answers are included