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Flashcards Genes & Environment Interplay Year 2.4 Psychology
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Why do children of a parent with Huntington's disease have a 50% chance of developing Huntington's disease themselves?
Why do children of a parent with Huntington's disease have a 50% chance of developing Huntington's...
Offspring will always inherit the recessive allele from the unaffected parent, but they have a 50% chance of inheriting the dominant allele from the affected parent. As the allele is dominant, only one is needed to develop the disorder.
Most important about Mendel's law of independent assortment is its exceptions. What is so important about this?
Most important about Mendel's law of independent assortment is its exceptions. What is so important...
This is important because it makes it possible to map genes to chromosomes. If two traits are inherited independently, offspring of all four possible types would be found; dominant for both genes, dominant for one gene and recessive for the other, recessive for one gene and dominant for the other, and recessive for both genes. However, if the law of independent assortment is violated, only two types would be found; dominant for both genes, and recessive for both genes. If this is the case, the genes must reside on the same chromosome. This phenomenon is called linkage. Aside from being on the same chromosome, linked genes must also be very close together on the chromosome.
The most common type of colour blindness involves difficulty distinguishing red and green and has an interesting pattern of heredity. What pattern?
The most common type of colour blindness involves difficulty distinguishing red and green and has an...
When the mother is colour blind and the father is not, all of the sons but none of the daughters are colour blind. When the father is colour blind and the mother is not, offspring are seldom affected. However, half the sons of the daughter of a colour-blind father are likely to be colour blind.
The specific pairing of the bases is important for DNA to carry out its two functions. Which two functions are these?
The specific pairing of the bases is important for DNA to carry out its two functions. Which two fun...
1. To replicate itself.
2. To direct the synthesis of proteins according to the genetic information that resides in the particular sequence of bases.
What is the difference between univariate genetic analyses and multivariate genetic analyses?
What is the difference between univariate genetic analyses and multivariate genetic analyses?
Univariate genetic analyses estimate the relative contributions of genetic and environmental factors to the variance of one trait. Multivariate genetic analyses, on the other hand, estimate the relative contributions of genetic and environmental factors to the covariance between multiple traits.
What is candidate gene-by-environment interaction?
What is candidate gene-by-environment interaction?
In DNA studies, candidate gene-by-environment interaction refers to genotype-environment interaction in which an association between a particular (candidate) gene and a phenotype differs in different environments.
Does the heritability of personality increase, decrease, or stay the same throughout life?
Does the heritability of personality increase, decrease, or stay the same throughout life?
The heritability of personality traits is essentially zero during the first few days of life but increases during infancy. Of course, personality is also measured very differently at this early age. Throughout the rest of the life span, heritability does not change.
What is known about the stability of the heritability of weight?
What is known about the stability of the heritability of weight?
Longitudinal twin studies have found no heritability for birth weight, increasing heritability during the first year of life, and stable heritabilities of 70% thereafter. A recent longitudinal study found that heritability of BMI increased from 43% at age 4 to 82% at age 10, which was confirmed by genomewide SNP-heritability and polygenic risk score approaches.
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