The developing of the humans, fish and other kind of embryos share the features like tails and gill like features. The human embryos resemble that of other species because these are related with the evolutionary relationship belonging to the same ancestor.
Full Answer
The similarity between a fish, frog, bird and human embryos is evidence of some distant common ancestor. All of these organisms have a common ancestor even though they are distinct organisms.
They are said to be in Hardy-Weinberg equilibrium: - Very large population: No genetic drift can occur. -No immigration or immigration: No gene flow can occur. -No mutations: No new alleles can be added to the gene pool.
Thus, mutations can cause new alleles to appear in a species and increase the genetic variation in the species. Mutation can cause new variations of genes to enter the gene pool of a species or an entire population. Therefore, the correct answer is B).
Unlike natural selection, genetic drift does not depend on an allele's beneficial or harmful effects. Instead, drift changes allele frequencies purely by chance, as random subsets of individuals (and the gametes of those individuals) are sampled to produce the next generation.
A population of alleles must meet five rules in order to be considered “in equilibrium”: 1) No gene mutations may occur and therefore allele changes do not occur. 2) There must be no migration of individuals either into or out of the population. 3) Random mating must occur, meaning individuals mate by chance.
Which of the following statements best explains how a condition of Hardy-Weinberg equilibrium results in a population that exhibits stable allele frequencies (i.e., a nonevolving population) ? Without migration or mutation, new alleles cannot be introduced to the population.
The correct option is c. Gene flow refers to the transmission of genetic constituents between two populations. With the help of this process, new alleles enter into the population, resulting in genetic variation with the populations.
THE FORCES OF EVOLUTION. Today, we recognize that evolution takes place through a combination of mechanisms: mutation, genetic drift, gene flow, and natural selection. These mechanisms are called the “forces of evolution” and together they can account for all the genotypic variation observed in the world today.
So, the correct answer is 'Individuals with the most favorable traits survive and reproduce'
For example: When people who have the gene causing a specific genetic trait, like freckles, reproduce with people who do not have the gene, the gene can become more popular (nearly everyone in that population has freckles) or totally disappear from the population (no one has freckles).
In natural selection, organisms with environmentally selected traits are better able to adapt to the environment and pass on their genes. Major causes of variation include mutations, gene flow, and sexual reproduction. DNA mutation causes genetic variation by altering the genes of individuals in a population.
The founder effect is one that occurs when a small group of individuals breaks off from a larger population to establish a colony. The new colony is isolated from the original population, and the founding individuals may not represent the full genetic diversity of the original population.
Candidates should be able to calculate allele, genotype and phenotype frequencies from appropriate data and from the Hardy-Weinberg equation, p2 + 2pq + q2 = 1 where p is the frequency of the dominant allele and q is the frequency of the recessive allele.
Hardy-Weinberg Principle states. principle that allele and genotype frequencies in a population will remain constant unless one or more factors cause the frequencies to change. Hardy-Weinberg formula. p² + 2pq + q² = 1 ; can be used to determine if a populations is in genetic equilibrium.
The Hardy-Weinberg model makes the following assumptions: no selection at the gene in question; no genetic drift; no gene flow; no mutation; random mating. What is the frequency of the A1A2 genotype in a population compose of 20 A1A1 individuals, A1A2 individuals, and 100 A2A2 individuals?
Hardy-Weinberg equilibrium assumes: no gene flow, mutation, genetic drift, or natural selection.
It is always like how the early stage of embryos of all vertebrates looks alike. Only the subsequent development and growth makes the fishes different from frogs, frogs from reptiles and reptiles from birds and birds from man. The expression of real difference occurs only when they start growing and developing further. Similarly, the starting point is likely to be same for everyone. But how one chooses to differentiate, grow and develop further only that makes them different and unique. They sustain their passion, effort and commitment.
Nature conveys a strong management message to the corporate man through the identical/similar looking embryos of all vertebrates. This management message both the winner and the loser must remember.
A vertebrate is a group of animals that have backbone full developed such as fishes, amphibians (frogs and toads), reptiles and birds and mammals including man. Embryos of all vertebrates look identical or similar in the early stage of growth.
A vertebrate is a group of animals that have backbone full developed such as fishes, amphibians (frogs and toads), reptiles and birds and mammals including man. The early stage of an embryo of all these groups of animals curiously looks alike. Only when they grow further, they differentiate to fish, frog, reptile, bird or man.
The expression of real difference occurs only when they start growing and developing further. Similarly, the starting point is likely to be same for everyone. But how one chooses to differentiate, grow and develop further only that makes them different and unique. They sustain their passion, effort and commitment.
The four groups of vertebrates are although totally different genetically and biologically but still they look similar at the beginning.
At least a billion years after eukaryotic cells evolved (1800mya)
Peahens choose to mate with peacocks that have the most beautiful tails.
Another difference is the heart. Frogs have a heart with three chambers, while humans have a heart with four chambers. The electric currents that flow through the heart of a frog are different from the electric currents that can be found in humans. Both frogs and humans have many of the same organs. Frogs and humans have lungs, stomachs, a heart, ...
The major difference between frogs and humans is that frogs are cold-blooded, egg-laying amphibians. Humans are warm-blooded mammals, which do not lay eggs. Instead, humans, like other mammals give live birth. Frogs are reptiles with smooth skin. Their young develop through the process of metamorphosis.
Frogs cannot regulate their body temperature. They use the rays of the sun to heat up their body. However, humans are warm blooded creatures with blood that regulates their internal temperature of their body. Another difference is the heart. Frogs have a heart with three chambers, while humans have a heart with four chambers.
Both frogs and humans have many of the same organs. Frogs and humans have lungs, stomachs, a heart, a brain and livers. Humans also have a spleen, a small intestine, a large intestine, a pancreas, and a cloaca; in addition to a urinary bladder, a gall bladder along with a ureter.
The developing of the humans, fish and other kind of embryos share the features like tails and gill like features.
Q12. How many images will be formed if the two mirrors are placed edge to edge at the following angles? (a) 45⁰ (b) 180° (c) kept parallel (3)
A species of wild flower has a range of pink blossoms, from light to medium to dark pink. It has two pollinators. One pollinator is attracted mainly to the light pink flowers and the other to dark pink flowers. What type of natural selection will occur to the population of flower over generations?
a. involves the isolation of a small colony of individuals from a larger population. A species of wild flower has a range of pink blossoms, from light to medium to dark pink. It has two pollinators.
in both alloptric and sympatric speciation members of a population must have becoms (Blank) isolated from each other.
one species of pine trees releases its pollen in early spring. another species releases its pollen in the late summer. This is an example of
You discover a prokaryote that can make its own food in the absence of light. It requires no organic molecules. Nutritionally, you would classify this pro. as a