Enlist the steps involved in inbreeding of cattle. Suggest two disadvantages of this practice.
Superior Female: It is the cow or buffalo that produces more milk per lactation. Superior Male: It is the bull that gives rise to a superior progeny as compared to other males. The steps involved in the inbreeding of cattle are as follows:
Superior males and superior females of the same breed are identified and are made to mate in pairs. The progeny obtained is evaluated and superior males and females among them are identified for further mating.Following are the two disadvantages of the process of inbreeding:
Continuous inbreeding among cattle causes inbreeding depression. It decreases the fertility and also the productivity of an animal.Fill in the blanks:
(a) Humans reproduce __________. (asexually/sexually)
(b) Humans are__________. (oviparous/viviparous/ovoviviparous)
(c) Fertilization is __________ in humans. (external/internal)
(d) Male and female gametes are __________. (diploid/haploid)
(e) Zygote is __________. (diploid/haploid)
(f) The process of release of the ovum from a mature follicle is called__________.
(g) Ovulation is induced by a hormone called the __________.
(h) The fusion of male and female gametes is called _____________.
(i) Fertilisation takes place in _____________.
(j) Zygote divides to form _____________which is implanted in uterus.
(k) The structure which provides vascular connection between fetus and uterus is called ____________.