Answer:
the correct answer is C) 32%
Explanation:
Sickle-cell anaemia is an autosomal recessive genetic disorder. Individuals with the homozygous recessive have sickle-shaped blood cells. Whereas, individuals with heterozygous are only carrier of sickle cell trait. The carrier individuals are resistant to malarial parasite and do not have malaria.
As per the question, 4% of an African population is born with sickle-cell disease, then the percentage of the population is heterozygous and resistant to malaria will be:
Hardy-Weinberg formula is equilibrium,
p² + 2pq + q² = 1
p = frequency of the dominant allele in the population
q = frequency of the recessive allele in the population
p2 = percentage of homozygous dominant individuals
q2 = percentage of homozygous recessive individuals
2pq = percentage of heterozygous individuals
Given, homozygous recessive for this gene (q2) is 4% which is 0.04, the square root (q) is 0.2 (20%) then p should be 1-0.2 = 0.8 (20%).
Thus, the frequency of heterozygous individuals = 2pq.
2 (0.8 x 0.2) = 0.32 (32%).
Answer: <em>The steps used in scientific methods are to ask a question, form a hypothesis, test the hypothesis, analyze the results, draw conclusions, and communicate results. A controlled experiment tests only one factor at a time so that scientists can determine the effects of changes to just that one factor.</em>
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Answer: The correct answer is -
D. They determine the inherited traits of an organism.
Gene can be described as segment of DNA (deoxyribonucleic acid) that codes for particular protien, which determines specific trait (which is an inherited trait) of the organism.
Genes are located on chromosomes as considered as the unit of heredity as they are passed from one generation to the next generation.
Examples for inherited trait include eye color, skin color, hair shape and color etc.
Thus, option D) is the right answer.
GLUCOSE IS CONVERTED INTO CELLULOSE FOR MAKING CELL WALLS. GLUCOSE IS COMBINED WITH NITRATES (COLLECTED FROM THE SOIL) TO MAKE AMINO ACIDS, WHICH ARE THEN MADE INTO PROTEINS. GLUCOSE IS TURNED INTO LIPIDS FOR STORING IN SEEDS.
Answer: The Joker is a very popular character with boys, perhaps because laughter is part of their own “mask of masculinity.” A potential negative consequence of this stereotype is the assumption that boys and men should not be serious or emotional. However, researchers have also argued that humorous roles can be used to expand definitions of masculinity.
The Jock is always willing to “compromise his own long-term health; he must fight other men when necessary; he must avoid being soft; and he must be aggressive.” By demonstrating his power and strength, the jock wins the approval of other men and the adoration of women.
The Strong Silent Type focuses on “being in charge, acting decisively, containing emotion, and succeeding with women.” This stereotype reinforces the assumption that men and boys should always be in control, and that talking about one’s feelings is a sign of weakness.
The Big Shot is defined by his professional status. He is the “epitome of success, embodying the characteristics and acquiring the possessions that society deems valuable.” This stereotype suggests that a real man must be economically powerful and socially successful.
The Action Hero is “strong, but not necessarily silent. He is often angry. Above all, he is aggressive in the extreme and, increasingly over the past several decades, he engages in violent behavior.”
The Buffoon commonly appears as a bungling father figure in TV ads and sitcoms. Usually well-intentioned and light-hearted, these characters range from slightly inept to completely hopeless when it comes to parenting their children or dealing with domestic (or workplace) issues.
Explanation:
