The term "linkage" was coined by?
1. T.H. Morgan
2. T.Boveri
3. G.Mendel
4. W.Sutton
In the following human pedigree, the filled symbols represent the affected individuals. Identify the type of given pedigree:
1. Autosomal dominant
2. X-linked recessive
3. Autosomal recessive
4. X-linked dominant
In his classic experiments on pea plants Mendel did not use?
1. Seed color
2. Pod length
3. Seed shape
4. Flower position
A pleiotropic gene:
1. | Is expressed only in primitive plants |
2. | Is a gene that evolved during Pliocene |
3. | Controls a trait only in combination with another gene |
4. | Controls multiple traits in an individual |
How many pairs of contrasting characters in pea plants were studied by Mendel in his experiments?
1. | Five | 2. | Six |
3. | Eight | 4. | Seven |
Alleles are:
1. different phenotype
2. true breeding homozygotes
3. different molecular forms of a gene
4. heterozygotes
A human female with Turner's syndrome:
1. has 45 chromosomes with XO
2. has one additional chromosome.
3. exhibit male character
4. is able to produce children with a normal husband.
Which of the following statements is not true of two genes that show 50% recombination frequency?
1. | The genes are tightly linked. |
2. | The genes show independent assortment. |
3. | If the genes are present on the same chromosome, they undergo more than one crossing-over in every meiosis. |
4. | The genes may be on different chromosomes. |