The different globin genes in each cluster are sequentially expressed in tightly controlled patterns during the various stages of prenatal and adult development
What gene structure helps regulate globin gene transcription by controlling both the timing and the starting point for transcribing DNA into mRNA?
promoters
You might also like to view...
You've likely heard of polar bears (Ursus maritimus) and grizzly bears (Ursus arctos horribilis). Have you hear of a grolar bear or a pizzly bear? These might be unfamiliar because they are the offspring of matings between polar bears and grizzlies
A handful of these animals have been born in zoos; three have been documented in nature. Due to their rarity, only a few grolars (grizzly dad and polar bear mom) or pizzlys (polar bear dad and grizzly mom) have been studied in detail. Their fur color, head shape, and ear shape are striking intermediates between the phenotypes of their parents. It is thought that polar bears originated from a population of brown bears (Ursus arctos) that became geographically isolated during a glaciation event that occurred about 150,000 years ago (Lindqvist et al., 2010). Traditionally the territories of grizzly bears and polar bears did not overlap, as grizzlies ranged from Alaska to Mexico, whereas polar bears stayed on the annual sea ice over the Arctic continental shelf and within the Arctic archipelagos. Relatively recently (last 50 years or so) grizzlies and polar bears have begun to come in contact in the wild. References: Lindqvist, Charlotte; Schuster, Stephan C.; Sun, Yazhou; Talbot, Sandra L.; Qi, Ji; Ratan, Aakrosh; Tomsho, Lynn P.; Kasson, Lindsay et al. (2010). Complete mitochondrial genome of a Pleistocene jawbone unveils the origin of polar bear. PNAS 107 (11): 5053-5057. doi:10.1073/pnas.0914266107. PMC 2814953. PMID 20194737. The origin of polar bears was the result of A. allopatric speciation. B. sympatric speciation. C. peripatric speciation.
In the female, the ____ acts as a temporary endocrine gland and secretes ____
a. pituitary; LH and FSH b. corpus luteum; estrogen and progesterone c. ovaries; estrogen and LH d. endometrium; estrogen and FSH e. uterus; LH and FSH
The protein ____________________ produces power strokes that lead to sarcomere shortening. Fill in the blank(s) with the appropriate word(s)
The method of contracting an illness after touching a contaminated doorknob, diaper or
handkerchief is a. direct contact. b. indirect contact. c. inhalation contact. d. contact with a vector. e. retro-contact.