Answer and Explanation:
All cells including the gametes contain chromosomes. Each gamete cell after cell division contains 23 chromosomes. After fertilization, the diploid number of chromosomes which is 46 is restored in the zygote.
Meiosis, a type of cell division, has two phases which eventually lead to the formation of four daughter cells with equal number of chromosomes. Gametes are haploid in nature and thus meiosis I involves separation of homologous chromosomes hence the reduction in the chromosome number. Meiosis II involves separation of sister chromatids in the daughter cells resulting in four daughter cells with 23 chromosomes.
Meiosis ensures that chromosoe number does not double with each successive generation as the resulting daughter cells are gametes, two of which must fuse to form a zygote.
Answer:
Carbon compounds plants passing in the form of carbohydrates, protein, and lipids along the food chains to the animals.
Explanation:
In the food chain, plants produce glucose as food and cellulose for their cell wall. Animals eat plants for their food. So through the food chain, carbon presents in plants move to animals in the form of lipids, proteins, and carbohydrates mainly.
Answer:
c. pupil
Explanation:
Answer:
The correct answer would be 1) a person with AB blood type.
Codominance is the condition in which both the alleles of the gene express themselves completely in the heterozygous condition.
AB blood group can be a perfect example of the codominance. Both the alleles (A and B) express themselves completely and lead to the formation of protein A (or antigen A) and protein B (antigen B) on the surface of the red blood cells.
Answer:
atomic number
Explanation:
The number of protons in an atom determines its atomic number, which is a defining trait of an element. In a neutral atom, the same number of protons also equals the number of electrons. However, the mass number or atomic mass is the total number of protons and neutrons.
The number of protons in the nucleus of an atom determines its atomic number. This is a defining trait of an element and determines its identity. For instance, any atom with six protons is the element carbon, which has an atomic number of 6 - this applies irrespective of the number of neutrons or electrons present.
Moreover, in a neutral atom, there must be an equal number of positive and negative charges implying that the number of protons is equal to the number of electrons. Thus, the atomic number indicates not only the number of protons but also the number of electrons in an atom.
The atomic mass or mass number of an atom, on the other hand, is the total number of protons and neutrons in an atom. Therefore, you can derive the number of neutrons by finding the difference between the mass number and the atomic number: (A - Z = number of neutrons).
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Answer:
An enzyme is a protein. Any change in the primary structure of a protein (the primary structure is the aminoacid sequence) can induce a change in the secondary, as well as tertiary structure (tridimensional conformation). This change in the shape of the enzyme can affect its activity, since it can change the active site consequently to this conformational change.
Explanation: