(a) Explain any two ways by which apomictic seed can develop.
(b) List one advantage and one disadvantage of a apomictic crop.
(c) Why do farmers find production of hybrid seeds costly?
Answers
Explanation:
(A) Amniocentesis – It is a pre-natal diagnostic test in which amniotic fluid (the fluid that surrounds the unborn baby inside the uterus) is drawn out from the womb of a pregnant woman using a needle. It is used to test the chromosomal pattern of the cells in the amniotic fluid which helps to determine the sex of the foetus and to detect genetic disorders like Down’s syndrome, anaemia, thalassemia, etc.
(B) Lactational amenorrhea – During lactation, the menstruation is absent in the woman who is lactating. This is known as lactational amenorrhea. The chances of conception during this time period are nearly zero.
(C) ZIFT – It is the short form of Zygote Intra Fallopian Transfer. The sperm of the male and ova from the female are fused together in the laboratory. This leads to the formation of a zygote which when is at the 8-blastomere stage, is transferred to the fallopian tube.
(c) A poster including the slogans about the importance of reproductive health care and child health care. Include slogans like "Hum Do Humaare Do" or "Stop Female Infanticide" or "AIDS Prevention."
OR
(a) The viable seeds produced without pollination or fertilization, are called apomitic seeds. It is an asexual method so the offspring is a clone of parent. Example – Asteraceae and grasses.