DSST Anthropology as a Discipline 2

Your answer explanation mendel thus showed that even

Info icon This preview shows pages 5–7. Sign up to view the full content.

Your Answer: Explanation Mendel thus showed that, even if the eminence of some ancestor were entirely the reflection of his genes, it is quite likely that some of his descendants, especially the more remote ones, would not inherit these "good" genes at all. In sexually reproducing organisms, humans included, every individual has a unique hereditary endowment. Question 13 of 55 Mendel's first principle of genetics states that the sex cell of a plant or animal may contain one factor (allele ) for different traits but not both factors needed to express the traits. Your Answer: Explanation In essence, each parent's sex cell contributes one factor for a trait. The trait (i.e. eye color) cannot be expressed without the sex cells from both parents, which combine to give the required two genes in a genotype. A variation of a gene is known as an allele. For example, the gene for eye color has several alleles--blue, brown, black, hazel, etc.. Question 14 of 55 Mendel's second principle of genetics states that characteristics are inherited independently from other characteristics. Your Answer:
Image of page 5

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

Explanation For example, a trait for blue eyes is not dependent on the trait for height within an individual organism. A person gets genes which determine eye color, as well as genes which help determine height--they are independent of each other. Question 15 of 55 Mendel's third principle states that each inherited characteristic is determined by two heredity factors/genes, one from each parent, which determines whether a gene will be dominant or recessive . Your Answer: Explanation Also known as the law of Dominants and Recessives (Mendel's third principle). Certain genes are dominant, and others are recessive. If a child receives a brown eyed gene from one parent, and a blue eyed gene from the other, he will have brown eyes. Why? Because brown eyes is a dominant gene, and blue eyes are recessive. It would take two blue eyed genes (one from each parent) to have blue eyes. Question 16 of 55 In biology, adaptation is the process by which an animal or plant becomes fitted to its environment ; it is the result of natural selection acting upon heritable variation. Your Answer: Explanation Even the simpler organisms must be adapted in a great variety of ways: in their structure, physiology, and genetics; in their locomotion or dispersal; in their means of defense and attack; in their reproduction and development; and in other respects. Question 17 of 55 Accurate adaptations may involve migration to, or survival in, favorable conditions (i.e. temperature). Alternatively, organisms may partly manufacture their own adaptations . An example are mammals, which produce their own optimum body temperature. Your Answer: Explanation To be useful, adaptations must often occur simultaneously in a number of different parts of the body. A change from a more carnivorous to a more vegetarian diet necessitates alterations not only of the teeth, digestive juices, and length of the digestive tract but also in habit and defense mechanisms.
Image of page 6
Image of page 7
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern