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weeeeeb [17]
3 years ago
15

Meaning of alleles, dominant, heterozygous, homozygous, and recessive?

Biology
2 answers:
Dafna11 [192]3 years ago
5 0

Answer:

Alleles: allele is a variant form of a gene. Some genes have a variety of different forms, which are located at the same position, or genetic locus, on a chromosome. Alleles are called diploid in humans.

Dominant: In genetics, dominance is the phenomenon of one variant of a gene on a chromosome masking or overriding the effect of a different variant of the same gene on the other copy of the chromosome.

Heterozygous: Zygosity is the degree to which both copies of a chromosome or gene have the same genetic sequence.

Homozygous: Homozygous is a word that refers to a particular gene that has identical alleles on both homologous chromosomes

Recessive: Recessive: A condition that appears only in individuals who have received two copies of a mutant gene.

valentinak56 [21]3 years ago
3 0

Answer:

alleles-one of two or more alternative forms of a gene that arise by mutation and are found at the same place on a chromosome.

dominant- The dominant allele of the gene is inherently dominant,so it hides the presence of the recessive allele

heterozygous-having two different alleles of a particular gene or genes.

homozygous-a particular gene that has identical alleles on both homologous chromosomes

recessive-A recessive gene is a gene that can be masked by a dominant gene

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Bingel [31]

Complete question:

You hang a swing from a live tree branch that is roughly parallel to the ground. What will likely happen over time as the tree grows? Check All That Apply

  1. The swing will move farther away from the tree trunk.
  2. The swing will move up. away from the ground.
  3. The swing will remain in its original position.
  4. The swing's ropes will become embedded in the branch.

Answer:

The swing's ropes will become embedded in the branch.

Explanation:

The trunk or branch strangulation sadly occurs very often. When people tie a young tree with different materials, such as a rope, or a cable, or a wire, and leave it there, the leash will eventually strangulate the tree.

Strangulation occurs because the tree keeps growing, applying pressure on the leash. The vascular system is in the trunk perimeter under the crust. Through the years, the pressure increases, the trunk is even more strangulated, and the vascular system is affected. One of the first and principal effects of strangulation is the increase in the trunk or branch diameter over the leash. This diameter change is because elements of the sap can not go back to the roots and keep near the strangulation. At this point, there are two options:

  • The tree can sort this by including the leash in its tissues, surrounding and absorbing it, and keep growing normally

or

  • The vascular system is so affected that the tree can not sort this problem and so, those parts of the tree located over the leash dye.

<em>In the exposed example, it seems that the tree could make it and included the swing's ropes in the branch. </em>

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