Answer:
Vasopressin, a hormon is secreted by pituitary gland which is response to dehydration , causes kidney to excrete less water.
The effect of temperature or nutrition on the expression of genes are examples of how <u>the environment </u>can alter the phenotype.
Increases in temperature (warm environments) showed a non-significant increase in a phenotypic manner and a marginally significant increase in phenotypic variability. Larger increases in temperature noticed extra increases in phenotypic variability, but no increase inside the mean phenotypic response.
Usually, growing temperature induced an acceleration inside the improvement, and the higher the temperature, the sooner the expression reaction of any particularly focused gene. In more detail, larval yolk utilization and growth rates multiplied, while yolk utilization performance decreased with increasing temperature.
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Answer:
75%
Explanation:
This question involves a single gene coding for the ability to taste the chemical PTC. The allele coding for the ability to taste (T) is dominant over the allele coding for the inability to taste (t). This means that an heterozygous individual will have the ability to taste PTC.
According to this question, if two heterozygous tasters (Tt) cross to have a large family i.e. Tt × Tt, the following gametes will be produced by each parent;
Tt = T and t
Using these gametes in a punnet square (see attached image), the following proportion of offsprings will be produced:
TT, Tt, Tt - Tasters (3/4 or 75%)
tt - Non-taster (1/4 or 25%)
Note that based on the question asked, there is a 75% probability that their first child will be a taster because there is equal segregation of alleles into gametes.
Answer:
While humans, as well as other vertebrates, have a closed blood circulatory system (meaning that the blood never leaves the network of arteries, veins and capillaries), some invertebrate groups have an open circulatory system containing a heart but limited blood vessels.
Explanation:
Crossing over occurs between prophase I and metaphase I and is the process where two homologous non-sister chromatids pair up with each other and exchange different segments of genetic material to form two recombinant chromosome sister chromatids. So the answer would be Prophase l. Hope this helps
