Answer:
The model showing the condition must represent a recombination between the X and Y chromosome during meiosis in male.
Explanation:
In males, the sex chromosomes are X and Y, whereas, the females have XX chromosomes. When the X chromosome of males fuses with the female gamete it give rise to a female progeny.
The Sry gene is present on the Y chromosome. In some cases, the recombination between the X and Y chromosome during meiosis in males takes place and result in an X chromosome containing Sry gene. This Sry gene is responsible for the male characters and progeny carrying two X chromosomes, in which one has the Sry gene would have the male characters.
So, the in this case should represented the crossing over between the X and Y chromosomes in males and then passing of the Sry containing X chromosome to progeny.
Answer:
Symbiosis
Explanation:
<em>Escherichia coli</em> is a species of Gram-negative bacteria that lives in the large intestine of humans and animals that are <u>healthy</u>. There,<u> it produces important vitamins that humans need for nutrition, such as vitamin K, B-complex vitamins, which makes it essential for the proper functioning of our organism and our health</u>. In return,<u> it receives the nutrients it needs for growth and division</u>.
This species belongs to the group of essential microbiota of our organism that play an important role in our nutrition, metabolism, digestion, and even in our mood.
This means that <em>E. coli</em> lives in a symbiotic relationship with its host, the human. Therefore, if this species of bacteria is absent in our organism, due to antibiotic overuse for example, it could have important negative impacts in our health.
The answer to this question is c. <span>by bending its stem toward the sun.</span>
