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ahrayia [7]
3 years ago
8

Upon fertilization, the egg and sperm fuse to form a single cell called a(n) ________.

Biology
1 answer:
Tpy6a [65]3 years ago
6 0
Egg + sperm --> zygote
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DD is homozygous dominant, the dominant allele will shown so they will have dimples.

<h3>Homozygous dominant:</h3>
  • When an organism is homozygous, it contains two copies of the same allele for a gene.
  • When two copies of the same dominant allele or two copies of the same recessive allele are present in an organism, it is said to be homozygous dominant or homozygous recessive.
  • Homozygosity is the presence of two dominant alleles (AA) or two recessive alleles (aa).
  • The recessive allele is suppressed by the dominant one.

Heterozygous dominant:

  • The two distinct alleles in a heterozygous genotype interact with one another. This controls how their characteristics are shown.
  • This encounter frequently centers on dominance.
  • The stronger allele is referred to as "dominant," whilst the weaker allele is referred to as "recessive." The dominant allele covers up this recessive one.

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Genetic variation makes individuals within a species different. Fertilization results in each offspring having a copy of each ge
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Genetics is a branch of biology concerned with the study of genes, genetic variation, and heredity in living organisms.[1][2][3]

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Trait inheritance and molecular inheritance mechanisms of genes are still primary principles of genetics in the 21st century, but modern genetics has expanded beyond inheritance to studying the function and behavior of genes. Gene structure and function, variation, and distribution are studied within the context of the cell, the organism (e.g. dominance), and within the context of a population. Genetics has given rise to a number of subfields, including epigenetics and population genetics. Organisms studied within the broad field span the domains of life (archaea, bacteria, and eukarya).

Genetic processes work in combination with an organism's environment and experiences to influence development and behavior, often referred to as nature versus nurture. The intracellular or extracellular environment of a cell or organism may switch gene transcription on or off. A classic example is two seeds of genetically identical corn, one placed in a temperate climate and one in an arid climate. While the average height of the two corn stalks may be genetically determined to be equal, the one in the arid climate only grows to half the height of the one in the temperate climate due to lack of water and nutrients in its environment.

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