Biology Test - 69

People who don't have hyperhidrosis are constantly sweating; they just might not notice it. Whenever your body temperature begins to increase, your autonomic nervous system stimulates your eccrine sweat glands (the average person has 2.6 million of them) to secrete fluid onto the surface of your skin.

Darwin's finches (also known as the Galápagos finches) are a group of about 15 species of passerine birds. They are well known for their remarkable diversity in beak form and function. They were first collected by Charles Darwin on the Galápagos Islands during the second voyage of the Beagle.

Females typically have two of the same kind of sex chromosome (XX), and are called the homogametic sex. Males typically have two different kinds of sex chromosomes (XY), and are called the heterogametic sex.

Organism phenotypically similar but genotypically different is said to be heterozygous. They are normally not pure and are termed as a hybrid. The Heterozygote doesn't breed true on the self-fertilization process for example Tt. They also carry two different copies of the same alleles with a certain gene.

Tip of the Tongue: Humans May Taste at Least 6 Flavors. Scientists disagree about whether humans can detect more than five basic tastes (sweet, sour, bitter, salty and umami)

Centimorgan. In genetics, a centimorgan (abbreviated cM) or map unit (m.u.) is a unit for measuring genetic linkage. It is defined as the distance between chromosome positions (also termed loci or markers) for which the expected average number of intervening chromosomal crossovers in a single generation is 0.01.

Homozygous : If both the genes of a pair are of the same kind it is said to be Homozygous. Homozygous Recessive: If both the genes of pair are recessive , it is said to be homozygous recessive.

Homozygote - An organism with identical pairs of genes for a specific trait. If both of the two gametes that fuse during fertilization carry the same form of the gene for a specific trait, the organism is said to be homozygous for that trait.

The 23-megabase nuclear genome consists of 14 chromosomes, encodes about 5,300 genes, and is the most (A + T)-rich genome sequenced to date. Genes involved in antigenic variation are concentrated in the subtelomeric regions of the chromosomes.

The term “cistron” is a unit of function. Recon: They are locations within a gene which participate in recombination. There is a minimum distance between recons within a gene, and recombination cannot occur within a recon. The term “recon” is a unit of recombination.