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Developing Person Through

Psychology

Quiz 3 :

The New Genetics

Quiz 3 :

The New Genetics

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Describe how the gender of a fetus is decided at conception.
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Sex is determined by the 23rd set of chromosomes. If the set contains two X chromosomes, then the infant is female. If it contains an X and a Y, then the infant is male. The mother's egg cell is always an X. Therefore, the father's sperm determines the sex of the infant since the sperm can carry either an X or a Y chromosome. img

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All living things are composed of cells, and the work of cells is done by _____.
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proteins

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Explain how color blindness is inherited and why it is much more common in one gender than the other.
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Color blindness is an X-linked recessive gene. This means that it is always passed on from a mother on the X chromosome. Since boys have one X and one Y chromosome, if they inherit one recessive gene on the X chromosome, they have no dominant chromosome to overpower it on the Y chromosome. This makes them much more apt to be color-blind. Girls have two X chromosomes. This means that they will usually have a dominant gene on the other X chromosome. Thus, they may carry the trait but will not experience it themselves. img

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If the 23rd pair of chromosomes is _____, the individual will be female.
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Each variation of a gene is called a(n) _____.
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The first 22 chromosomes contain hundreds of genes in the same positions and sequence. If the code of the gene from one parent is exactly like the code on the same gene from the other parent, the gene pair is _____.
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The first 22 chromosomes contain hundreds of genes in the same positions and sequence. If the code of the gene from one parent differs from the code on the same gene from the other parent, the gene pair is _____.
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Briefly describe differentiation and when it begins. Give at least two examples of cell differentiation.
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A person's collection of genes is referred to as his or her _____.
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Describe epigenetics and explain how it could influence whether or not a person develops diabetes.
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Define genotype and phenotype, explain the impact of both on an individual's traits, and give an example of each.
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Describe three of the surprises revealed upon the completion of the Human Genome Project.
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What makes Down syndrome a chromosomal condition? Identify four characteristics that are often associated with Down syndrome.
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Explain how nature and nurture can interact to result in alcohol use disorder.
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Almost every cell in the human body contains _____ chromosomes.
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Explain how cells, proteins, deoxyribonucleic acid (DNA) molecules, chromosomes, and genes are related to each other.
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_____ are located on chromosomes and are units of instructions for cells.
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Describe the difference between monozygotic and dizygotic twins and how each type is conceived.
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Describe how a one-celled zygote develops into a baby with 26 billion specialized cells due to the processes of duplication, division, and differentiation.
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In 22 of the 23 pairs of chromosomes, both members of the pair are closely matched. Each of these 44 chromosomes is called a(n) _____.
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