Answer:
Allele frequency can be described as a phenomenon which measure how common an allele is in a particular population. It tells about the genes which are richest in a gene pool and it also shows the genetic diversity in a population. Allele frequency is often expressed in percentages.
Natural selection tends to favour those organisms that are best adapted to live in an environment and which can withstand changes occurring in the ecosystem. If due to some circumstances, a trait becomes less useful to organisms in a population then by natural selection the allele frequency for those alleles will reduce with time. Similarly, the alleles which code for better genes for an environmental change will be increased due to the phenomenon of natural selection.
I think the answer is 3 and 4
Answer:
the heart
Explanation:
this is a cardiac muscle, it involuntary. While skeletal muscles are attached to bones.
Answer:
Crossing over and random alignment are the events of meiosis-I that add new gene combinations to the gametes. Random fusion of male and female gametes is called random fertilization.
Explanation:
During the pachytene stage of meiosis-I, part of the chromatids of each of the homologous chromosomes of a bivalent is broken apart and exchanged. This exchange of the genetic material between the members of a bivalent is called crossing over. The recombinant chromatids formed by crossing over have new allele combinations that were otherwise not present in the parental chromatids.
During metaphase I, the homologous pairs are aligned at the cell's equator in a random manner. This means that either the paternal or maternal chromosome of a pair may face one or the other pole of the cell. The arrangement of chromosomes during metaphase-I determines whether the paternal or maternal chromosome of each pair would be distributed to one or the other pole of the cell. This random segregation creates new gene combinations in gametes.
All the gametes have equal chances of getting fused with a gamete from the opposite gender. This is called random fertilization and further adds variations.
I think fiber. you need the fiber to remove bowel and make room for more
