Explain the importance of ‘selection’ during inbreeding in cattle.
Importance of ‘selection’ during inbreeding of catlle is as follows:
(i) By selection at every step, productivity of inbreed population is increased.
(ii) It helps in the accumulation of desired superior genes, so as to obtain more milk per lactation.
(iii) It helps in eliminating the less desirable genes from cattle population.
(iv) It helps to eliminate the harmful recessive genes.
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 ____________.