Epigenesis, and genetic–environmental correlation

1. What strengths and limitations do the clinical (or case study) method and ethnography have in common?

3. What is epigenesis, and how does it differ from range of reaction and genetic–environmental correlation? Provide an example of epigenesis.

4. Links between family and community foster development throughout the lifespan. Cite several examples from our discussion that support this idea.

5. Why is genetic counseling called a communication process? Who should seek it?

6. Using your knowledge of X-linked inheritance, explain why males are more vulnerable than females to miscarriage, infant death, genetic disorders, and other problems.

7. Why is the period of the embryo regarded as the most dramatic prenatal period? Why is the fetal period called the “growth and finishing” phase?

8. What functions does REM sleep serve in young infants? Can sleep tell us anything about the health of the newborn’s central nervous system? Explain.

Sample Solution

Epigenesis, and genetic-environmental correlation

It is estimated that over 8,000 human diseases are caused by defects in single genes (Kaplan, 2002). These unifactorial or monogenic diseases, such as cystic fibrosis and hemophilia, are individually rare and affect approximately one percent of the human population. Gene-environment interactions are thought to be mediated by epigenetic modifications of the genome, and epigenetic changes of the genome often arise in response to changes in the environment (Jaenisch and Bird, 2003). Unlike genetic changes, epigenetic changes are more dynamic and are often reversible, depending on the existence or removal of the inducing factors. Gene-environment interactions can alter gene activities and lead to cascades of cellular events to facilitate the adaptation of an individual cell to its environment.

spellings, reading and times tables and promote the use of multiple levelled practice within all classes, teachers use concrete, pictorial and abstract resources to support the pupils needs within the school, the use of free printing allows teachers to create tiered worksheets for their classes to better promote progress for all and the written responses by teachers to pupils reflection comments of their work are differentiated with the emphasis on personalised targets and outcomes for all.

Whilst some teachers at school A make three tiered worksheets such as mild, spicy and hot and give the pupils choice over which one they want to do, others create three tiered worksheets and hand them out to the pupils they deem suitable to attempt that level. We have seen from Bartlett’s (2016) influential research that ‘students should make a choice based on their performance in that skill/concept at the time built on mini assessments during the main teaching point and with the guidance from a teacher’. Differentiated instruction is a necessity in today’s world of diverse learners. It may involve providing choice among options; offering activities for various learning styles or cognitive abilities; using technology as a tool for providing varied activities, designing alternatives for students with disabilities, or providing opportunities to extend learning. Differentiation is not so much what you do, but how you think about the learning process (Pritchard,A.2005)
Often teachers differentiate solely based upon prior data (for example, they have already pre-assigned pupils to different worksheets before the lesson has even begun, teachers should use any data they have as a tool to support planning but don’t make the common mistake of using it to pre-assign pupils to a specific pathway (Bartlett, J. 2016) After observed practice took place conversations between the author and teachers arose regarding differentiation. Some teachers felt that their students would pick unsuitable worksheets having been given the choice based on 2 things; they would choose something easier that they felt comfortable with and knew they could do, therefore not deepening their understanding or challenging themselves but getting a lot of written work done, or they chose something too challenging in order to brag to their classmates but they wouldn’t understand how to complete the work and then struggle throughout the class, not improving their understanding and getting minimal work done. Bartlett, J (2016) is a known critic of the theory of categorising pupils according to a predetermined ability. He suggests ‘Where differentiation won’t work to best effect is when we categorise pupils according to a predetermined ability and this is one of the concerns when teachers

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