In pedigree analysis a square joined with a circle by a single line means marriage whereas a square joined by two lines with a circle means mating between relatives (consanguineous marriage).
Which symbol in pedigree analysis indicate mating between relatives?
In pedigree analysis, unaffected male is represented by square and unaffected female by circle. Full shaded diamond represent the affected individuals with unspecified sex. A square and circle is connected with two horizontal lines show the mating between relatives.
Which symbol is used for mating between relatives?
A male is represented by a square or the symbol ♂, a female by a circle or the symbol ♀. Mating is shown by a horizontal line (marriage line) connecting a male symbol and a female symbol; offspring symbols are connected in a row (sibship line) beneath the mated pair.
What do the following symbols indicate in the pedigree chart?
In a pedigree a square represents the male, a circle the female, solid (blackened) symbol shows the trait under study or affected individual; unaffected or normal individual by an open or clear symbol and a cross or shade (of any type) in the symbol signifies the carrier of a recessive allele.
Which of the following symbols represent a recessive allele?
Recessive alleles are denoted by a lowercase letter (a versus A). Only individuals with an aa genotype will express a recessive trait; therefore, offspring must receive one recessive allele from each parent to exhibit a recessive trait.
How do you explain a pedigree chart?
A pedigree chart displays a family tree, and shows the members of the family who are affected by a genetic trait. This chart shows four generations of a family with four individuals who are affected by a form of colorblindness. Circles represent females and squares represent males.
Which of the following symbols represents consanguineous mating?
In pedigree analysis a square joined with a circle by a single line means marriage whereas a square joined by two lines with a circle means mating between relatives (consanguineous marriage). So, the answer is option D.
Are circles male or female?
The use of shapes as gender symbols may have originated from kinship diagrams in anthropology, where a circle represents a female and a triangle represents a male.
How many generations are shown in this pedigree?
(7.4) Pedigree flashcards
|How many generations are shown on this pedigree?,||3 generations are shown.|
|Which individual is a female affected by the trait of interest?,||I-2 is the affected female.|
|Which individual is a male affected by the trail of interest?,||III-2 is the affected male.|
What does a triangle mean in terms of a pedigree?
A triangle is used for any pregnancy not carried to term. … Pregnancy (P), Stillbirth (SB), Spontaneous abortion (SAB), Termination of pregnancy (TOP), Ectopic pregnancy (ECT).
Which allele is always written first?
The alleles are represented by letters. The letter chosen is usually the first letter of the trait.