Most Important HUMAN GENETICS One Liners for Govt Jobs Exam

Most Important HUMAN GENETICS  One Liners 

- If a couple has three daughters, then the chances that the fourth child will be a son is 50%

- If a dihybrid pea plant heterozygous for flower colour (red dominant over white) and seed shape (round dominant over wrinkled) under goes selfing, 4 types of gametes are produced.

- The crossing of a homozygous tall plant with a dwarf would yield plaits in the ratio of one homozygous tall, one homozygous dwarf and two heterozygous tall

- Blue eye colour in human is recessive to brown eye colour. The expected children of a partner between blue-eyed woman and brown-eyed male who had a blue-eyed mother are likely to be one blue-eyed and one brown-eyed

- The genotype of a dominant parent is determined by crossing it with the recessive parent. It is known as test cross

- Chromosome theory of heredity was given by Sutton and Boveri

- Continuity of germplasm theory by WEISMANN was proposed in 1883

- Allosomes are the sex chromosomes.

- An inherited Change is known as Mutation

- The Recessive mutation are expressed normally in homozygous condition

- Somatic mutation is not heritable

- HNO2 is a mutagen

- Oenothera lamarkiana plant was made popular by “DE VRIES mutation theory”

- Sickle cell anaemia is an example of a point mutation

- Artificially induced and recessive Mutations are used in agriculture

- The X-linked Inheritance results in total colour-blindness

- If a man is hemophiliac this means that he inherited this condition from his mother

- Holoandric genes located on Y-chromosome

- “Barr body” is derived from X-chromosome in female

- The hybrid vigour is Heterosis

- The Pure line selection results in retention of desired characters in several generation 

- Klinefelter‟s syndrome and Down‟s syndrome have equal number of chromosomes

- The Rh factor name is derived from monkey

- Hershey and Chase proved that DNA is a genetic material

- Watson and Crick composed the model of DNA structure in year 1953

MOST IMPORTANT BIOLOGY ONE-LINERS (SET-1)
MOST IMPORTANT BIOLOGY ONE-LINERS (SET-2)