Answer:
PP x PP; PP x Pp; PP x pp
Explanation:
Since the allele for purple flowers, P, is dominant, in order to be possible for all the offspring to have purple flowers, at least one of the parents must have the homozygous dominant genotype PP.
If one of the parents has a homozygous dominant genotype, all of the offspring will have purple flowers regardless of the other parent's genotype since one allele P will be passed down. Therefore, all of the possible genotype combinations are:
PP x PP; PP x Pp; PP x pp
Answer:
The reproductive success of these people would be:
A) lower.
B) higher.
C) higher.
D) lower.
Explanation:
Vitamin D is a type of secosteroid and its synthesis in the epidermis is dependent on sun exposure (UVB radiation). This vitamin is key to have normal growth and to properly absorb calcium, magnesium, and phosphate.
Melanin, on the other end, is a natural pigment also found on skin that is responsible for our skin color and protects our bodies from UVB radiation damage. On people with darker skin tones, the higher levels of melanin hinder Vitamin D synthesis since it acts as a natural protector against the sun.
For this reason, light-skinned people (low melanin levels, high vitamin D synthesis) live better in the poles, where they can absorb limited UV because of the weaker sunlight. Dark-skinned people are better off living in regions with the stronger sunlight, like the tropics.
The 1st answer (A) . That's called law of inertia.
Rest of the statements are true. But non of them are stated as laws.
Answer:
If the ovary does not enter the fallopian tube, it falls into the abdominal cavity and cannot be fertilized unless it finds it's way back to the uterus. Ectopic or tubular pregnancy would cause the fallopian tube to swell and eventually rupture.
Explanation:
When ovaries are released by the oviduct, it enters the fallopian tube, fertilizes and moves to the uterus where it is implanted. But if the ovum does not enter the fallopian tube, which could be as a result of an abnormality or the fallopian tube removed to prevent pregnancy or for medical reasons, then the ovum enters the abdominal cavity.
Pregnancy is still possible in this case if the ovum finds its way back to the uterus or IVF is been administered to the patient to induce pregnancy.
Ectopic or tubular pregnancy occurs when a fertilized egg is implanted in the fallopian tube. This is sometimes the case in the early weeks of pregnancy but eventually moves to the uterus. In severe cases, it would remain in the tube which in turn would make the tube swell and rupture.
