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Only one. The X chromosome is bigger and contains things not on the Y chromosome. So if the only copy men have are the diseased copy, then they will have the color blindness or whatever other disease in question. Since the genes are usually recessive, then females would typically have one good copy that is generally dominant.
There is a theory that in one type of color blindness, the genes are co-dominant. So instead of just the normal 3 types of cone cells in the eye, or the mutated red cones with the rest being normal, the women with both the normal and the mutated genes end up having both the normal and mutated cones, thus having a greater level of color discrimination than normal.
What else can I help you with?
True or false even though a gene has multiple alleles a person can carry only two of those alleles?
True
What are different versions of the same gene called?
Different versions of the same gene are called alleles. Alleles can differ in their DNA sequence, resulting in variations in the traits they encode for. These variations can lead to differences in an organism's phenotype.
Different versions of the same gene are called?
Different versions of the same gene are called
What kind of alleles for a gene are carried on homologous chromosomes?
The kind of alleles for a gene that are carried on homologous chromosomes are many. These are for similar genes which may be slightly different like the eyes, hairline, dentures and so much more.
Different or alternative forms of the same gene are called?
Alleles are alternate forms of the same gene. A gene is the basic physical unit of heredity that is passed on from a parent to their children.
How alleles and genes related?
Genes and alleles are related because alleles are inside a gene. Genes are made up by alleles. A gene is DNA. The allele is like piece of DNA inside a gene.
Homologous chromosomes are similar in all of these characteristics EXCEPT?
Homologous chromosomes are similar in terms of size, shape, and genes, but they are not similar in terms of the specific alleles they carry. Each homologous chromosome may carry different alleles for the same gene, leading to genetic diversity.
Different forms of a gene?
the alternative form of a gene is called an "allele."
Two different forms of the same gene are called?
Alleles
Which term describes the movement of alleles into out of a population?
Gene flow
What are two forms of a gene called?
The two different molecular forms of a gene are called alleles.
Difference between a gene and an allele?
The alleles are the different forms of the gene. This is simplified, but an example might be, if the gene is "eye color," the alleles would be "green, blue, brown, etc." The variations in the gene are the alleles.
