Answer:
Speciation has become complete when organisms of one population do not recognize the mating call of another population and so mating does not occur. Which of the following statements about reproductive barriers and speciation is true? Speciation can occur with even a single gene mutation if that mutation involves reproductive barriers.
Explanation:
As women age, many experiences an increased sense of urgency to void, as well as an increased risk of incontinence. This is usually the result of age-related changes in the bladder.
Incontinence is the inability to regulate urination, which can range from a minor leak of pee after laughing, sneezing, or coughing to a full lack of bladder control. Numerous conditions, such as urinary tract infections, vaginal infections or irritations, or constipation, can cause incontinence. Some drugs have the potential to induce momentary bladder control issues. Weak pelvic floor muscles or a weak bladder may be to blame for incontinence that lasts longer.
The bladder wall may stiffen with age and lose some of its capacity to store pee. You lose some of your ability to hold it. Additionally, you might need to urinate more frequently and be more likely to get urinary tract infections. Bladder control concerns, such as leakage or urinary incontinence (inability to contain pee), or urinary retention are among the kidney and bladder issues that are more likely to develop as we age (not being able to completely empty your bladder) infections of the bladder and other urinary tracts (UTIs)
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It would decrease, because the producers are the source of food for the herbivores
Answer:
12:3:1
Explanation:
<em>The typical F2 ratio in cases of dominant epistasis is 12:3:1.</em>
<u>The epistasis is a form of gene interaction in which an allele in one locus interacts with and modifies the effects of alleles in another locus</u>. There are different types of epistasis depending on the type of alleles that are interacting. These include:
- Dominant/simple epistasis: Here, a dominant allele on one locus suppresses the expression of both alleles on another locus irrespective of whether they are dominant or recessive. Instead of the Mendelian dihybrid F2 ratio of 9:3:3:1, what is obtained is 12:3:1. Examples of this type of gene interaction are found in seed coat color in barley, skin color in mice, etc.
- Other types of epistasis include <em>recessive epistasis (9:3:4), dominant inhibitory epistasis (13:3), duplicate recessive epistasis (9:7), duplicate dominant epistasis (15:1), and polymeric gene interaction (9:6:1).</em>
