Explanation
Correct option: A
Explanation:
Hence, ‘Boveri and Sutton’ is the correct answer.
In some organisms, alleles in the homozygous state are harmful to the body. It is called Lethality and the genes are called Lethal genes. Eg: body colour of mice. In mouse, body colour yellow, in dominant homozygous condition is lethal to the body. It leads to the death of the body. A mouse with a heterozygous yellow body(Yy) is crossed with another mouse with a heterozygous yellow body(Yy), 4 types of progeny are obtained, in which one mouse is killed, because of lethality and remaining three mice are survived.
A. 3:1 – Monohybrid phenotypic ratio
B. 1:1 – Monohybrid test cross ratio
C. 1:2:1 – Monohybrid genotypic ratio
D.2:1 – dihybrid leathal gene ratio
It was developed by a british geneticist, Reginold.C.Punnett
It is a graphical representation to indicate all possible union of gametes during fertilization and to calculate the probability of all possible genotypes of offsprings in a genetic cross.
The possible gametes are written on two sides, usually the row and left columns.
All possible combinations of gametes during fertilization are represented in boxes below in the squares, which generates a square output form.
So, the correct option is ‘Probable result of a cross’.
It was developed by a British geneticist, Reginold.C.Punnett.
All possible combinations of gametes during fertilization are represented in boxes below in the squares, which generates a square output form. So, the correct option is ‘Punnett’.
In the Mendel dihybrid cross, in the F2 generation 16 progeny are formed. In this 9 are yellow round 3 yellow wrinkled, 3 green round and 1 green wrinkled. So in the 16 progeyn, 15 progeny show both dominant phenotypes or one phenotype. Only one progeny shows both recessive characters.
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