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प्रश्न
How is the sex of a newborn determined in humans?
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उत्तर
Sex of a newborn in humans is genetically determined, that is, genes inherited from the parents determine the sex of a baby. If a newborn inherits one X chromosome from mother and X chromosome from father, this newborn will become a girl and if a newborn inherits one X chromosome from mother and Y chromosome from father, this newborn will become a boy.
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संबंधित प्रश्न
Give Technical Term:
The ratio of offspring on F2 generation in a dihybrid cross.
Under which conditions does the law of independent assortment hold good and why?
In pea plants, yellow seeds are dominant to green. If a heterozygous yellow seed pant is crossed with a green seeded plant, what ratio of yellow and green seeded plants would you expect in the F1 generation?
A cross between two tall plants resulted in offspring having few dwarf plants. What would be the genotypes of both the parents?
Two linked genes a and b show 20% recombination. The individuals of a dihybrid cross between ++ /++ × ab/ab shall show gametes ______.
The process of mating between closely related individuals is ______.
A fruit fly exhibiting both male and female traits is ______.
In a dihybrid cross AABB x aabb, F2 progeny of AABB, AABb, AaBB and AaBb occurs in the ratio of ______.
In a dihybrid cross, F2 phenotypic ratio is 13 : 3. It is case of ______.
Mendel’s Law of independent assortment holds good for genes situated on the ______.
Each gamete carry ______.
Assertion: When the two genes in a dihybrid cross are situated on the same chromosome, the proportion of parental gene combinations is much higher than the nonparental type.
Reason: Higher parental gene combinations can be attributed to crossing over between two genes.
What is the difference between genetic drift and change due to natural selection?
Which one of the following genetic ratios will be obtained in a dihybrid test cross:
The Law of independent assortment is applicable for the traits which ______
The ratio of 9 : 3 : 3 : 1 is due to:
Mendel's law of independent assortment is based on F2 ratio of:
Describe the dihybrid cross upto F2 generation as conducted by Gregor Mendel using pure lines of Garden Pea for characters-seed shape and seed colour.
