The research suggest octopus and other cephalopods, like squid and cuttlefish, all rely on the ancient chromosome to ...

Autosomal chromosomes are homologous, meaning they code for similar traits. For example, the two copies of chromosome 1 will have copies of the same genes — one from each parent. Sometimes one ...

Researchers have identified a sex chromosome in the California two-spot octopus. This chromosome has likely been around for 480 million years, since before octopuses split apart from the nautilus on ...

Translocations generate novel chromosomes, but are often linked to ... Figure 2 shows an example of a spectral karyotype prepared from acute myeloid leukemia cells with multiple translocations ...

Females (XX) carry twice as many X-linked genes on their sex chromosomes as males (XY). How do cells control gene expression to manage this potentially lethal dosage problem? A prime example of X ...

Where Aa = female genotype close genotypeThe alleles that an organism has for a particular characteristic, usually written as letters. Probability close probabilityThe extent to which something is ...

Polyploidy refers to the presence of an extra set of chromosomes. Triploidy, for example, usually occurs when 2 spermatozoa fertilize an oocyte, resulting in a zygote that contains 3 sets of ...

The octopus just revealed another one of its secrets: what determines its sex. University of Oregon researchers have ...

Half of the possible offspring have the same allele combination; AA homozygous dominant and the other half have the Aa heterozygous combination. Probability close probabilityThe extent to which ...