Genes are carried on Chromosomes
Gene are unity of heredity
Susan, a mother with type B blood, has a child with type O blood. She claims that Craig, who has type AB blood, is the father. He claims that he cannot possibly be the father. If the judge heeds the rules of inheritance and assumes that a mutation did not occur, then the expected ruling is that Craig is right and doesn't have to pay child support.
The most common sex chromosome complement of a human female is (XX)
The most common sex chromosome complement of a human male is (XY)
Alleles are alternate forms of a gene
Genetically, son is more closely related to his mother than to his father because of an X-chromosome carries more genetic information than a Y-chromosome.
All the offspring of a cross between a black-eyed fruit fly and a red-eyed fruit fly have black eyes. This means that the allele for black eyes is dominant to the allele for red eyes.
(XXX) is a trisomy
There is 50% probability that a couple having two female children, their next child will be male
Genes, such as those for red hair and freckles, that tend to be inherited together are referred to as linked gene.
Most human cells have 2 sets of chromosomes (2n; diploid), this means most cells carry a total of 46 chromosomes.
The AB blood type is the result of codominance
Polygenic inheritance refers to the situation where a single characteristic, such as height, is determined by the effects of many genes
Sex-limited inheritance applies to a situation in which males do not express a gene that is responsible for the collapse of the uterus into the vagina
Oncogenes is known as cancer-causing genes
Color-blindness is an example of a X-linked gene
In the determination of the expression of an individual's genes the environment often plays a role
In the United States, sickle-cell disease is most commonly seen in African-Americans
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