ANSC 1401 - TTU (Growth and
Development)
Growth - Answer a net increase in protein in the body, i.e., the amount synthesized over that
lost. Because fat, bone and water can be increased or decreed any time in the animals life, these
components are not included in a definition of growth
Measuring Growth - Answer growth = weight / time
ADG - Answer average daily growth
WDA - Answer weight per day of age - less commonly used
Growth of Cells - Answer 1) hypersplasia - increase in number of cells, mainly prenatal
2) hypertrophy - increase in size of cells ; fattening, wight lifter, calliphyge sheep
Prenatal - Answer uterus between fertilization of the ovum and birth, lower birth weight are
caused by larger litter,s ambler mothers, younger mothers, and nutrition of the mother
Postnatal - Answer after birth, relative growth rate declines with age, but accelerates after
puberty beings
Preweaning - Answer before young is taken from the mother of she weans it
1) weaning - calves (7 months), pigs (3-5 weeks), lambs (2-6 months)
2) weaning weight affected by mothers milk, creep feed, pasture, genetics, age of dam, sex,
castration, diet
Post Weaning - Answer from weaning to slaughter or to entry into the breeding herd
Market Weights - Answer 1) steers - 1300 lb. avg.
2) heifers - 1,200 lb. avg.
3) barrows and gilts - 270 lb. avg.
4) lambs - 135 lb. avg.
5) factors affecting post weaning gain: amount and type of feed, genetics, sex, age, climate
Development)
Growth - Answer a net increase in protein in the body, i.e., the amount synthesized over that
lost. Because fat, bone and water can be increased or decreed any time in the animals life, these
components are not included in a definition of growth
Measuring Growth - Answer growth = weight / time
ADG - Answer average daily growth
WDA - Answer weight per day of age - less commonly used
Growth of Cells - Answer 1) hypersplasia - increase in number of cells, mainly prenatal
2) hypertrophy - increase in size of cells ; fattening, wight lifter, calliphyge sheep
Prenatal - Answer uterus between fertilization of the ovum and birth, lower birth weight are
caused by larger litter,s ambler mothers, younger mothers, and nutrition of the mother
Postnatal - Answer after birth, relative growth rate declines with age, but accelerates after
puberty beings
Preweaning - Answer before young is taken from the mother of she weans it
1) weaning - calves (7 months), pigs (3-5 weeks), lambs (2-6 months)
2) weaning weight affected by mothers milk, creep feed, pasture, genetics, age of dam, sex,
castration, diet
Post Weaning - Answer from weaning to slaughter or to entry into the breeding herd
Market Weights - Answer 1) steers - 1300 lb. avg.
2) heifers - 1,200 lb. avg.
3) barrows and gilts - 270 lb. avg.
4) lambs - 135 lb. avg.
5) factors affecting post weaning gain: amount and type of feed, genetics, sex, age, climate
