I) I think four gametes are possible in either a male or a female. That is; GY, gY, Gy, and gy.This is because both traits are heterozygous which means for a certain gene there are two different alleles. While in the case of homozygous there would only be one type of gametes since for a given gene there are two similar alleles. ii) I think crossing over or recombination could cause the alleles that are linked with the wing color and the eye color genes to be exchanged between the two chromosomes in a pair, thus, resulting to new combinations of alleles. The final result would then be an increase in possible genetic variation.
Answer:
They are also referred to as sex cells. Female gametes are called ova or egg cells, and male gametes are called sperm. Gametes are haploid cells, and each cell carries only one copy of each chromosome. These reproductive cells are produced through a type of cell division called meiosis.
Explanation:
Answer: Ginkgo
Explanation:
There are 4 types of gymnosperms that produce fleshy fruits around their seeds which are usually considered as cones. These are Ginkgo, conifers, gnetophytes, and cycads. These plants have been evolved for fruit production as gymnosperms are known for their naked ovules and their seeds are stored in rough woody structure that is called as cone. There are separate males and female cones are present in gymnosperms.
Among the options given Ginkgo is the correct option it produces cones that look like berries. This advantageous evolution and helps in transfer of seeds through animals as they consume fruits or berries and disperse seeds in their feces.
Answer: a. action potential frequency is high enough that no relaxation of muscle fibers occurs.
Explanation:
A tetanic contraction occurs due to repeated stimuli at short intervals. In this situation, the muscle fiber does nor relax and contracts again. It is a process of sustained contraction of muscles, which evoke when the motor nerve innervates a skeletal muscle and emits the action potential at high rate. The muscles become hyperactive in this condition.
