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A male offspring can be afflicted with a Y-linked disease if his father has it.
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The characteristics or features that an organism has, such as eye color, skin color, hair color, tall or short is called a trait. In order for a trait to show up in the offspring, there should be two alleles present. One coming from the father, and the other from the mother. When fertilization occurs, the new offspring will have two alleles for every trait. The combination one has (coming from the father and from the mother) is called genotype. The two matching alleles is called homozygous while the two different alleles is called heterozygous. The allele that is expressed in heterozygous individuals is the dominant allele, while the allele that is not expressed is the recessive allele. The traits that are expressed make up you phenotype.
Answers:
- magnifies objects in steps: Compound light microscope
- is the type that was used to observe the first strands of DNA: Electron microscope
- contains a series of lenses: Optical microscope
- includes magnifying glasses: Compound light microscope
- creates a digital image: Electron microscope
- uses one lens for magnification: Simple microscope
The reaction is called ACROSOME REACTION. The acrosome reaction occurs during the sperm interaction with the egg before fertilization occur. The acrosome is a structure that is found on the head of the sperm, it contains a chemical called acrosin which the sperm used to penetrate the egg. Sperm which can not undergo acrosome reaction can not penetrate the egg for fertilization.
