Created by StemPy LabTwo statements about chromosomal disorders are given below. Statement I: A person with Klinefelter's syndrome has the karyotype 47, XXY and is a fertile female. Statement II: Down's syndrome was first described by Langdon Down in 1866.
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← Match the terms in List-I with their meanings in List-II.
List-I (Term)
A. Law of dominance
B. Law of segregation
C. Law of independent assortment
D. Test cross
List-II (Meaning)
I. In a dihybrid, the segregation of one pair of characters is independent of the other pair
II. In a dissimilar pair of factors, one member of the pair dominates the other
III. An organism with the dominant phenotype is crossed with the recessive parent to find its genotype
IV. The two alleles of a pair separate, so a gamete receives only one of themThree genes, A, B and C, control a polygenic trait in a plant, and each dominant allele adds the same amount to the phenotype. A plant AaBbCc is crossed with a plant aabbcc. How many phenotypic classes appear among the offspring, and what is the largest fraction of the offspring found in any one class? →
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