Class 12th Biology 2016 Set1 Delhi Board Paper Solution
Suggest the breeding method most suitable for animals that are below average in milk productivity.
Outcrossing method of breeding is employed in animals that are below average in milk productivity. It is the mating of animals within the same breed but having no common ancestors on either side of their pedigree upto 4-6 generations.
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5-ATGCATGCATGCATGCATGCATGCATGC-3
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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 ____________.