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Chapter 4 Infancy and Parenting . Copyright 2010 McGraw-Hill Australia Pty Ltd PPTs to accompany Claiborne & Drewery, Human Development 4-1 The child arrives into a repository of resources for learning • The family is a complex, constructed ecology – Each family has its own stories, meanings, preoccupations – The child is born into this complex environment • Relationships are multi-dimensional – Ancestors may be present through photographs and remembrances • Place offers a physical and social environment – Climate – Cultural expectations • Local traditions, laws, community . Copyright 2010 McGraw-Hill Australia Pty Ltd PPTs to accompany Claiborne & Drewery, Human Development 4-2 Becoming a parent • Is becoming a parent a human right? • Should aspiring parents have enough resources to support a child before becoming pregnant? • Planning for pregnancy has only been possible since the birth control “pill” arrived in the 1960s • Conception outside the woman’s body is possible, but not guaranteed to work • Assisted human reproduction raises numerous issues • Many pregnancies are unplanned . Copyright 2010 McGraw-Hill Australia Pty Ltd PPTs to accompany Claiborne & Drewery, Human Development 4-3 Genetic origins • All living cells contain deoxyribonucleic acid (DNA) • DNA carries the genetic messages which tell the cells how to behave • Each cell has half its genes from the father, and half from the mother • All human cells have 23 pairs of chromosomes . Copyright 2010 McGraw-Hill Australia Pty Ltd PPTs to accompany Claiborne & Drewery, Human Development 4-4 Conception • Conception is the meeting of a half string of chromosomes from the mother and a half string from the father • Meiosis germ cells (ovum or sperm) – Chromosomes separate from their pair string. • sperm + ovum conception (embryo) • The embryo embeds in the wall of the uterus – Successful? The mother is pregnant! • Cells continue to divide and multiply . Copyright 2010 McGraw-Hill Australia Pty Ltd PPTs to accompany Claiborne & Drewery, Human Development 4-5 ... - tailieumienphi.vn
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