Answer:
<h2>c</h2>
Explanation:
A true breeding: it is a kind of breeding in which the parents would produce offspring that all the offspring would contain the same phenotype.
This means that the parents are homozygous for each trait. So their all the offspring will be same as the parent.
So here a plant with purple flowers is allowed to self-pollinate, as generation after generation it produces purple flower, it means that it must be homozygous for purple color.
The lungs work by expanding and going back to their original size when you inhale and exhale. The rib cage also expands so the lungs can have more air inside and expand. Due to deformities, the rib cage might not expand and/or the diaphragm might not lower itself, which might lead to pressuring the lungs not to expand and having a lower volume of air inside. This leads to breathing difficulties.
There are 1 to 2 called alleles
