Answer:
A (one allele from each parent)
Explanation:
According to Mendel's experiments, an organism receives two forms of a gene called allele, one from each parent. He discovered in his law governing heredity that an organism will undergo meiosis and each of its gene variant (allele) will get separated into gametes (law of segregation). These gametes randomly combine when mated to yield two alleles in each offspring i.e. one from the male parent and one from the female parent.
He crossed pea plants in his experiment to observe the height trait. He crossed purebreeding pea plants that are homozygous dominant (Tall, TT) and recessive (short, tt). He realized that the F1 offsprings possess two alleles that is a combination of both alleles from the parent i.e. Tt.
He also realized that all the F1 offsprings are tall, which brought about his law of dominance, which says that an allele is capable of masking the expression of another in a heterozygous state. The allele that masks is called DOMINANT allele while the allele that is masked or covered up is RECESSIVE allele.
Hence, the F1 offsprings received a dominant allele (T) and recessive allele (t) from each parent to make up their genotype.
In this case, brown frogs increase and green frogs decrease, whereas natural selection would cause this change in allele frequency.
<h3>What is natural selection?</h3>
Natural selection is the main evolutionary force by which populations change (evolve) across time.
Natural selection leads to the change in the allele frequencies depending on the more adapted phenotypes in a given environment.
In conclusion, brown frogs increase and green frogs decrease, whereas Natural selection would cause this change in allele frequency.
Learn more about natural selection here:
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Answer:
Por cada par de electrones transportados a la cadena de transporte de electrones por una molécula de NADH, se generan entre 2 y 3 ATP. Por cada par de electrones transferidos por FADH2, se generan entre 1 y 2 ATP
Explanation:
Answer:
Why are plant reproductive structures ideal for plant reproduction? Plants reproduce using seeds and spores. ... Plants cannot move by themselves, but seeds and spores can be carried from one location to another. This allows plants to colonize other areas.
Explanation:
Hope it helps
Answer: D
Explanation:
Crossing over refers to homologous chrosmomes exchanging DNA which creates variation of chromsoomes that are inheried by offspring.