Topic 58

Question 1

Meat production

Answer 1

Marbling, MC4R gene, Myogenin gene, IGF (Insulin like growth factor); H-FABP

Question 2

Marbling

Answer 2

Gene-thermogenin; in beef cattle , intramuscular fat (palatability, juiciness, taste, tenderness, flavor); Wagyu, Kobe beef

Question 3

MC4R gene effect

Answer 3

Growth, daily gain, fat deposition, fat thickness

Question 4

Myogenin gene

Answer 4

regulates myogenesis; better lean meat ration, higher birth weight, lower back for fat thickness

Question 5

IGF (Insulin like growth factor)

Answer 5

Fetal growth and development, muscle gaining, fat production

Question 6

H-FABP

Answer 6

Heart fatty acid binding protein; Intramuscular fat content

Question 7

QTL

Answer 7

quantitative trait locus (QTL) is a locus (section of DNA) which correlates with variation of a quantitative trait in the phenotype of a population of organisms.[1] QTLs are mapped by identifying which molecular markers (such as SNPs or AFLPs) correlate with an observed trait. This is often an early step in identifying and sequencing the actual genes that cause the trait variation.