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Which is true of autosomal recessive diseases a. The disease can skips generations b. Males and Females have an equal chance of inheriting the mutant allele c. Only Males inherit the?
b. Males and Females have an equal chance of inheriting the mutant allele. Autosomal recessive diseases can affect males and females equally because the inheritance of the mutant allele is not linked to the sex chromosomes. The disease can skip generations due to carriers passing on the mutant allele without showing symptoms.
How does the environment play a role in changing the frequency of a mutant allele in a population?
The environment influences the frequency of a mutant allele in a population through natural selection, where certain alleles may confer advantages or disadvantages based on environmental conditions. For instance, if a mutant allele enhances survival or reproductive success in a specific habitat, its frequency may increase over generations. Conversely, if the environment changes and the allele becomes detrimental, its frequency may decline. Additionally, factors like migration and genetic drift can also interact with environmental changes to affect allele frequencies.
Is huntington disease homozygous or heterozygous?
Huntington disease is autosomal dominant, meaning that individuals who inherit one copy of the mutant allele from either parent will develop the disease. Thus, individuals with Huntington's disease are heterozygous for the mutant allele. Homozygous individuals would not survive past a certain age due to the severity of the disorder.
Can achondroplasia be passed on to offspring?
Yes. Most cases of achondroplasia are associated with a dominant mutant form of the FGFR3 gene. Thus, if someone with achondroplasia has children with a person without achondroplasia, 50% of the offspring would be predicted to inherit the disorder. If two people with achondroplasia were to have children, 50% would inherit acondroplasia (i.e. would be heterozygous for the mutant FGFR3 allele), 25% would be normal, and 25% would inherit two copies of the mutant FGFR3 allele, a condition which is almost certainly lethal.
20 out of 100 rabbits have white fur what is the allele frequency for the recessive allele?
To find the allele frequency for the recessive allele, we first determine the proportion of rabbits with white fur, which is 20 out of 100, or 0.20. Assuming white fur is caused by a recessive allele (let's call it "a"), these rabbits represent the homozygous recessive genotype (aa). Using the Hardy-Weinberg principle, if q² = 0.20, then q (the frequency of the recessive allele) is the square root of 0.20, which is approximately 0.447. Thus, the allele frequency for the recessive allele is about 0.447 or 44.7%.
Which is true of autosomal recessive diseases a. The disease can skips generations b. Males and Females have an equal chance of inheriting the mutant allele c. Only Males inherit the?
b. Males and Females have an equal chance of inheriting the mutant allele. Autosomal recessive diseases can affect males and females equally because the inheritance of the mutant allele is not linked to the sex chromosomes. The disease can skip generations due to carriers passing on the mutant allele without showing symptoms.
How does the environment play a role in changing the frequency of a mutant allele in a population?
The environment influences the frequency of a mutant allele in a population through natural selection, where certain alleles may confer advantages or disadvantages based on environmental conditions. For instance, if a mutant allele enhances survival or reproductive success in a specific habitat, its frequency may increase over generations. Conversely, if the environment changes and the allele becomes detrimental, its frequency may decline. Additionally, factors like migration and genetic drift can also interact with environmental changes to affect allele frequencies.
In nature genetically albino plants genotype gg do not survive long enough to produce seeds. Why do you thing some plants still carry the mutant g allele?
It may not be a "mutant" allele but a recessive allele that offers other (perhaps yet-unknown) benefits. Or, it has never caused a significant enough problem to have evolved out of the genome.
What is an example of allele frequency?
An example of allele frequency is when in a population of 100 individuals, 60 individuals have the dominant allele (A) for a specific gene, while 40 individuals have the recessive allele (a). The frequency of the dominant allele (A) would be 0.6, and the frequency of the recessive allele (a) would be 0.4.
What is null allele?
A null allele is a mutant copy of gene that completely lacks that gene's normal function. This can be the result of the complete absence of the gene product (protein, RNA) at the molecular level, or the expression of a non-functional gene product. At the Phenotypic level, a null allele is indistinguishable from a deletion of the entire locus.
Is huntington disease homozygous or heterozygous?
Huntington disease is autosomal dominant, meaning that individuals who inherit one copy of the mutant allele from either parent will develop the disease. Thus, individuals with Huntington's disease are heterozygous for the mutant allele. Homozygous individuals would not survive past a certain age due to the severity of the disorder.
Can achondroplasia be passed on to offspring?
Yes. Most cases of achondroplasia are associated with a dominant mutant form of the FGFR3 gene. Thus, if someone with achondroplasia has children with a person without achondroplasia, 50% of the offspring would be predicted to inherit the disorder. If two people with achondroplasia were to have children, 50% would inherit acondroplasia (i.e. would be heterozygous for the mutant FGFR3 allele), 25% would be normal, and 25% would inherit two copies of the mutant FGFR3 allele, a condition which is almost certainly lethal.
The mutant allele causing sickle-cell anemia is found at high frequency mainly due to?
Sickle cell anemia is found in high frequency because it is a codominant mutation. It only requires one allele for the gene to manifest.
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How do you find allele frequency in a population?
To find allele frequency in a population, you can calculate it by dividing the number of copies of a specific allele by the total number of alleles in the population. This can help determine how common a particular gene variant is within a group of individuals.
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