Which best describes the Chromosomal Theory of Inheritance? … The theory was proposed by Boveri-Sutton. It describes linkage, recombination, and crossing. over and states that Mendelian genes have specific loci on chromosomes, which undergo segregation and independent assortment.
Which describes the chromosome theory of inheritance?
The Chromosomal Theory of inheritance, proposed by Sutton and Boveri, states that chromosomes are the vehicles of genetic heredity. … Whereas linkage causes alleles on the same chromosome to be inherited together, homologous recombination biases alleles toward an inheritance pattern of independent assortment.
What was the key development of the chromosome theory of inheritance quizlet?
Gametic chromosomes combine during fertilization to produce offspring with the same chromosome number as their parents. Eye color in fruit flies was the first X-linked trait to be discovered; thus, Morgan’s experiments with fruit flies solidified the Chromosomal Theory of Inheritance.
Who has proposed the chromosomal theory of inheritance?
The chromosome theory of inheritance, or the idea that genes are located on chromosomes, was proposed based on experiments by Thomas Hunt Morgan using Drosophila melanogaster, or fruit flies.
What is extra chromosomal inheritance?
Extra chromosomal inheritance is also defined as non mendelian inheritance. Inheritance due to genes located in cytoplasm are plasmagenes. The genes are located in DNA present in mitochondria and in chloroplasts these are called organellar genes. This type of inheritance is also called as cytoplasmic inheritance.
How does the chromosome theory of inheritance provide a physical explanation for Mendelian inheritance?
The chromosome theory of inheritance explains Mendelian inheritance because the behavior of chromosomes during meiosis can account for the laws. … The Mendelian law of independent assortment is explained by the random alignment of the homologous chromosome pairs during metaphase I of meiosis.
Is responsible for the chromosome theory?
Sutton and Boveri: (a) Walter Sutton and (b) Theodor Boveri are credited with developing the Chromosomal Theory of Inheritance, which states that chromosomes carry the unit of heredity (genes).
Which of the following traits is influenced by inheritance and environmental factors?
Weight and height are common examples of characteristics that are influenced by both genetic and environmental factors.
What is chromosomal aberration?
Chromosomal aberrations are changes in chromosome structure or number. Most chromosomal aberrations are known as aneuploidies, or different numbers of chromosomes other than pairs. A trisomy is an aneuploidy with one extra chromosome, for a total of 3, and a monosomy has one fewer chromosome, for a total of 1.
What is mitochondrial inheritance?
Mitochondrial inheritance: The inheritance of a trait encoded in the mitochondrial genome. Because of the oddities of mitochondria, mitochondrial inheritance does not obey the classic rules of genetics.
What is maternal inheritance in genetics?
noun. A form of inheritance wherein the traits of the offspring are maternal in origin due to the expression of extranuclear DNA present in the ovum during fertilization.