<span>How can a mutation in a DNA base sequence cause a change in a trait?</span>
Answer:
Each species has a specific identifying number of chromosomes. For example, a cat, <em>Felis catus</em>, has 38 chromosomes, while corn, <em>Zea mays</em>, has 20 chromosomes each chromosome carries specific genes that are unique to that chromosome.
Explanation:
Chromosomes vary in shape and number among living beings. For example, the bacterial chromosome is a unique circular molecule, while human beings have 46 lineal chromosomes arranged in pairs (23 pairs). The total number of chromosomes is specific to each species, and it is denoted as the "chromosomic dotation" of the species.
Genes are the hereditable units that transmit the information needed to specify traits, from parents to offspring, generation to generation. Genes are arranged in sequence in the chromosomes. A chromosome might contain hundreds of thousands of genes.
Genes vary in size and shape. They are composed of pairs of bases, and these sequences also vary in number, producing genes of different lengths. In general, genes code for proteins. Proteins create the organism tissues and perform or carry out specific functions in the organisms, controlling almost all processes and chemical reactions.
Each chromosome carries <u>specific</u> genes that code for <u>specific </u>proteins that have <u>specific</u> functions in the organisms. Each chromosome carries information to synthesize different proteins needed to accomplish a certain function. But <u>not all chromosomes carry the same gene sequences</u>. Only homologous chromosomes carry information for the same trait, but even this information is not necessarily the same. They might have the same gene but different alleles.
If you choices are the following;
a. use and store O2.
b. use and make ATP.
c. store energy in glucose.
d. release energy from glucose.
The answer would be b. use and make ATP.
Both processes use and make ATP but the way they do this are reversed. In cellular respiration, ATP is made by breaking down complex molecules. Photosynthesis on the other hand uses ATP to produce complex molecules.
Answer:
-This/control
"To study this possibility, the scientist uses two groups of people who are over 75 years of age and have mild memory loss. The control group receives 100 pills that contain fish oil. The control group receives similar pills that don’t contain any active ingredients. These fake pills are called placebos."
Explanation:
