Gametes are made by meiosis, in which chromosomes make an exact copy of themselves. Remember, there are 2 chromosomes (1 from mum, 1 from dad) in each pair and these chromosomes swap genes randomly, which causes variation in gametes so offspring are different to each other and their parents. Fertilisation is also a random process - there are thousands of egg and sperm cells which could form a zygote and it is random which egg and sperm cells actually do. Offspring may also be born with a mutation (could be beneficial or harmful) which causes variation.
The variations in the DNA are responsible in differences between desirable traits and unwanted traits. Mutations also cause changes in the DNA.
The original source of all variations in heritable traits is genetic mutations. Mutations are changes in the DNA sequence that can create new traits or alter existing ones, providing the basis for genetic diversity within a population.
Genetic recombinations of DNA cause variations of genetic traits .
The study of inheritance traits is called genetics. It focuses on how traits are passed from parents to offspring through genes and how variations in genes contribute to different traits and characteristics in individuals.
Variations in DNA can lead to the inheritance of different traits through changes in the sequence of nucleotides. These changes can alter the structure and function of proteins, which are responsible for many traits. The inheritance of specific variations in DNA can result in differences in physical characteristics, behaviors, and susceptibility to certain diseases.
Genetic traits are variations of features passed on to offspring from there parents.
Variations in traits within a species originate from genetic mutations, environmental factors, and natural selection.
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height
Blood type
The variations in the DNA are responsible in differences between desirable traits and unwanted traits. Mutations also cause changes in the DNA.
The Owners
The original source of all variations in heritable traits is genetic mutations. Mutations are changes in the DNA sequence that can create new traits or alter existing ones, providing the basis for genetic diversity within a population.
They depend on natural variation in traits due to mutation.
Individuals of the same species exhibit variations in traits due to genetic differences, environmental influences, and random mutations during the process of reproduction. These factors can lead to differences in physical characteristics, behaviors, and other traits among individuals within a species.
Downstream genetics refers to the genetic variations that directly affect an individual's traits, while upstream genetics refers to the genetic variations that influence the expression of downstream genes. Upstream genetics can have a broader impact on inherited traits by regulating the activity of downstream genes.
Genetic recombinations of DNA cause variations of genetic traits .