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Fraternal twin
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Fraternal twinA twin who have shared a common uterine environment with its sibling. Fraternal twins are due to the fertilization of two different ova by different sperm. Fraternal twins are also called dizygotic twins.
RELATED TERMS--------------------------------------
Environment
The sum of the total of the elements, factors and conditions in the surroundings which may have an impact on the development, action or survival of an organism or group of organisms. The environment is as opposed to genetics. We are the product of our genetic inheritance and our environment.
Sibling
One of two or more individuals having at least one common parent.
Fertilization
The combining of the genetic material carried by sperm and egg to create an embryo. Normally occurs inside the fallopian tube (in vivo) but may also occur in a petri dish (in vitro).
Sperm
A sperm cell, or spermatozoon (pl. spermatozoa) (in Greek: sperm = semen and zoon = alive), is the haploid cell that is the male gamete. It is carried in fluid called semen, and is capable of fertilising an egg cell to form a zygote. A zygote can grow into a new organism, such as a human. Sperm cells contain half of the genetic information needed to create life. Generally, the sex of the offspring is determined by the sperm, through the chromosomal pair "XX" (for a female) or "XY" (for a male).
SIMILAR TERMS--------------------------------------
Fraternal twins
Born at the same time but resulting from the fertilization of two different eggs, fraternal twins are no more genetically similar than siblings; identical twins result from the division of one fertilized egg and are genetically identical.
PREVIOUS AND NEXT TERMS--------------------------------------
Frailty syndrome
A condition, seen particularly in older patients, characterized by low functional reserve, easy tiring, decrease of libido, mood disturbance, accelerated osteoporosis, decreased muscle strength, and high susceptibility to disease. People with the frailty syndrome may take a sudden turn for the worse and die. However, the frailty syndrome may sometimes be reversible.
Frambesia
Also known as yaws, frambesia is a common chronic infectious disease that occurs mainly in the warm humid regions of the tropics with characteristic bumps on the skin of the face, hands, feet and genital area. Almost all cases of yaws are in children under 15 years of age.
Framingham Study
A landmark study begun in 1948 in which some 12,000 residents of the town of Framingham, Massachusetts were enrolled in a study designed to gather medical data and, more recently, DNA samples. The participants in the Framingham study came in for regular medical exams and provided the information that researchers have requested. This extraordinary longitudinal (long-term) study has yielded a vast set of data from which invaluable health information has been extracted.
Frankenfood
Perjorative term for genetically modified food whether it be derived from genetically engineered plants or animals.
Frasier syndrome
A condition characterized by the presence of an XY sex chromosome constitution and undermasculinized external genitalia that may range from ambiguous in appearance to normal-looking female genitalia. There is also kidney disease (glomerulosclerosis) and gonadal tumors (gonadoblastoma). Frasier syndrome is caused by point mutations in the WT1 gene (in the intron 9 donor splice site).
Fraternal twin
Freckle
A flat circular spot on the skin about the size of the head of a nail that develops after repeated exposure to sunlight, particularly in someone of fair complexion. Freckles may be red, yellow, tan, light-brown, brown, or black. They are always darker than the skin around them since they are due to deposits of the dark melanin, a dark pigment.
Frenum
A restraining structure. Frenum is Latin for a bridle. A small frenum is a frenulum.
Frequency, urinary
Urinating too often, at too frequent intervals, not due to an unusually large volume of urine, but rather to a decrease in the capacity of the bladder to hold urine.
Frey syndrome
Sweating on one side of the forehead, face, scalp, and neck occurring soon after ingesting food as a result of damage to a nerve that goes to the large saliva gland in the cheek (the parotid gland).
Fridayitis
A perplexing condition that suddenly strikes some workers and students on Friday and leads to their absence that day from work or school.
RELATED TERMS--------------------------------------
Environment
The sum of the total of the elements, factors and conditions in the surroundings which may have an impact on the development, action or survival of an organism or group of organisms. The environment is as opposed to genetics. We are the product of our genetic inheritance and our environment.
Sibling
One of two or more individuals having at least one common parent.
Fertilization
The combining of the genetic material carried by sperm and egg to create an embryo. Normally occurs inside the fallopian tube (in vivo) but may also occur in a petri dish (in vitro).
Sperm
A sperm cell, or spermatozoon (pl. spermatozoa) (in Greek: sperm = semen and zoon = alive), is the haploid cell that is the male gamete. It is carried in fluid called semen, and is capable of fertilising an egg cell to form a zygote. A zygote can grow into a new organism, such as a human. Sperm cells contain half of the genetic information needed to create life. Generally, the sex of the offspring is determined by the sperm, through the chromosomal pair "XX" (for a female) or "XY" (for a male).
SIMILAR TERMS--------------------------------------
Fraternal twins
Born at the same time but resulting from the fertilization of two different eggs, fraternal twins are no more genetically similar than siblings; identical twins result from the division of one fertilized egg and are genetically identical.
PREVIOUS AND NEXT TERMS--------------------------------------
Frailty syndrome
A condition, seen particularly in older patients, characterized by low functional reserve, easy tiring, decrease of libido, mood disturbance, accelerated osteoporosis, decreased muscle strength, and high susceptibility to disease. People with the frailty syndrome may take a sudden turn for the worse and die. However, the frailty syndrome may sometimes be reversible.
Frambesia
Also known as yaws, frambesia is a common chronic infectious disease that occurs mainly in the warm humid regions of the tropics with characteristic bumps on the skin of the face, hands, feet and genital area. Almost all cases of yaws are in children under 15 years of age.
Framingham Study
A landmark study begun in 1948 in which some 12,000 residents of the town of Framingham, Massachusetts were enrolled in a study designed to gather medical data and, more recently, DNA samples. The participants in the Framingham study came in for regular medical exams and provided the information that researchers have requested. This extraordinary longitudinal (long-term) study has yielded a vast set of data from which invaluable health information has been extracted.
Frankenfood
Perjorative term for genetically modified food whether it be derived from genetically engineered plants or animals.
Frasier syndrome
A condition characterized by the presence of an XY sex chromosome constitution and undermasculinized external genitalia that may range from ambiguous in appearance to normal-looking female genitalia. There is also kidney disease (glomerulosclerosis) and gonadal tumors (gonadoblastoma). Frasier syndrome is caused by point mutations in the WT1 gene (in the intron 9 donor splice site).
Fraternal twin
Freckle
A flat circular spot on the skin about the size of the head of a nail that develops after repeated exposure to sunlight, particularly in someone of fair complexion. Freckles may be red, yellow, tan, light-brown, brown, or black. They are always darker than the skin around them since they are due to deposits of the dark melanin, a dark pigment.
Frenum
A restraining structure. Frenum is Latin for a bridle. A small frenum is a frenulum.
Frequency, urinary
Urinating too often, at too frequent intervals, not due to an unusually large volume of urine, but rather to a decrease in the capacity of the bladder to hold urine.
Frey syndrome
Sweating on one side of the forehead, face, scalp, and neck occurring soon after ingesting food as a result of damage to a nerve that goes to the large saliva gland in the cheek (the parotid gland).
Fridayitis
A perplexing condition that suddenly strikes some workers and students on Friday and leads to their absence that day from work or school.
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This dictionary contains 19186 terms.
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