1. (a) (i) gene length of DNA; codes for a (specific), polypeptide / protein / RNA; max 1 allele alternative form of a gene; found at a, locus / particular position on, a chromosome; max 1 (ii) assume allele refers to coat colour allele (coat colour) gene / alleles, only on X chromosome; A no (coat colour), gene / allele, on Y chromosome male cats, XY / only have one X chromosome; males have only one (coat colour) allele / cannot have two (coat colour) alleles; need black and orange alleles for tortoiseshell colour; 2 r r w w (b) parental genotypes C C × C C ;
ahel: Leu55A Ser55A Paralleelne evolutsioon: Golding and Dean (1998), Mol. Biol. Evol. 15:355369 chain: Pro119A Ala119A chain: Leu55A Ser55A Jessen et al. (1991) kui samad mutatsioonid viia inimese Hb, siis samuti suureneb hapnikusidumine Sama efekt hoolimata sellest millisel kontinendil on mutatsioon olnud, lihtsalt vajalik nendes tingimustes Fig. 3A. Andean Waterfowl and Alleles Hemoglobin Amino Acid Position Clade Species AlphaA BetaA 6 9 10 78 112 14 87 95 117 134 2 Chloephaga melanoptera Ala Ala Asn Thr Ile Gly Ser Asp Ala Met 3 Merganetta a. garleppi 2500 m Ala Thr Asn Ala Ile in progress Merganetta a
* E-mail: [email protected] Introduction (based on the peak heights of different nucleotides in the same position on the electropherogram) have been focused on analysing Ribosomal RNA genes (rDNA) have been widely used in alleles that differ by nucleotide substitutions [5,6]. Whereas, if the taxonomy, biogeographic and phylogenetic analyses. A eukaryotic gene variants differ due to insertion or deletion events, and genome has tens to thousands of rDNA copies, containing genes substitutions may be absent, a different strategy is needed to for 18S, 5.8S, and 28S rRNAs
RECESSIVE BROWN - THE ENIGMATIC BARRINGTON BROWN GENE Copyright 2010 Sarah Hartwell This page pulls together what is known about Don Shaw's Barrington Brown gene, a form of recessive brown/colour dilution only reliably recorded in a colony of laboratory cats, none of which are believed to have left the laboratory. To make this comprehensible to the non- genetics expert I have referred to "copies of genes" or "versions" of genes although the correct terminology is "alleles". There is also a brief guide to Shaw's terminology at the end as Shaw's writing pre-dated modern "standard" symbols and terminology. Don Shaw was an early feline geneticist in the USA. During the 1950s and 1960s, there was no standard form of genetic coding and Shaw used his own system of genetic coding which can be difficult to read today. He also referred to chocolate, which is a mutation of the black gene, as "chocolate dilution"
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