HEREDITY
LINKED GENES
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
Chromosome assortment during meiosis is not random.
|
|
|
Linked genes are located on the same chromosome.
|
|
|
The physical distance between genes can be determined.
|
|
|
Genes recombine independently during mitosis.
|
Detailed explanation-1: -Which conclusion is a result of Thomas Hunt Morgan’s research with fruit flies? Chromosome assortment during meiosis is not random.
Detailed explanation-2: -Morgan discovered a mutation that affected fly eye color. He observed that the mutation was inherited differently by male and female flies. Based on the inheritance pattern, Morgan concluded that the eye color gene must be located on the X chromosome.
Detailed explanation-3: -Morgan’s conclusion-that the white-eye trait followed patterns of sex chromosome inheritance-was at once very specific and very grand. A few years prior to these test crosses, Mendelian ideas of inheritance had been enthusiastically discussed by many researchers in the context of new findings about chromosomes.
Detailed explanation-4: -In his famous Fly Room at Columbia University’s Schermerhorn Hall, Morgan demonstrated that genes are carried on chromosomes and are the mechanical basis of heredity. These discoveries formed the basis of the modern science of genetics.