Answer:
True
Explanation:
The Drosophila like the mammals possess X and Y chromosomes but as in males in which the XX is female and XY is male, the sex In Drosophila is not determined by the presence of Y chromosomes as a male determining factor are present on the autosomes.
However, the Y chromosome is important for males as they are involved in the formation of the sperms therefore the presence of Y is important. In the given question if the allele is present ion the Y chromosome which can reduce the size therefore the allele is passed on to the males only ans no females.
Thus, true is the correct answer.
the fly is female (Bridges 1921, 1925). Thus, XO Drosophila are sterile males. In flies, the Y chromosome is not involved in determining sex. Rather, it contains genes active in forming sperm in adults.
Answer:
The gene that controls production of white blood cells.
Explanation:Gene expression within the body is controlled by the cells, which determine when a specific gene should or should not be expressed. Influenza (the flu) is caused by a virus that attacks the respiratory system
Answer:
The correct answer is A). The two forms are observed to interbreed successfully where their habitats overlap.
Explanation:
According to the biological species concept, the members in a population which interbreed with each other and produce viable offsprings comes under the same species. This classification does not involve morphology because even organisms having the same morphology can be of different species because they do not interbreed with each other in nature.
So here myrtle warbler and Audubon's warbler must be found interbreeding with each other and producing offsprings which have good survival rate and reproductive capability so this information might allowed scientists to reclassify these bird in the same species because only members of same species interbreed with each other. So the correct answer is A.
Lunar eclipses are more wildly visible because Earth casts a much larger shadow on the moon during a lunar eclipse than the moon casts on Earth during a solar eclipse. As a result, you are more likely to see a lunar eclipse than a solar!. ;)
Answer:
It is maternal inheritance (cytoplasmic inheritance) of the gene for petal color.
Explanation:
In the given experiment, the color of the petal is regulated by maternal inheritance. In the first step, the true-breeding pale plant was pollinated by a true-breeding normal plant, therefore, all the F1 was identical in terms of petal color to the female plant (the true breeding pale plant).
In the second step, the F1 pale plants were pollinated by the true breeding normal plant. Again, the petal color in the progeny was determined that the female parent (the F1 pale plant). If true breeding normal plants will be pollinated by true breeding or F1 pale plant, the progeny will exhibit "normal phenotype" for petal color since the female plant has normal phenotype here.
