Deviation from mendelism - class-XII
Description: deviation from mendelism | |
Number of Questions: 15 | |
Created by: Manjit Singh | |
Tags: biology classical genetics botany genetics |
Incomplete dominance was discovered by
When both the alleles are equally expressed in hybrid, the phenomenon is known as
Inheritance of blood group is a condition of
1. Co-dominance
2. Incomplete dominance
3. Multiple allelism
4. Multiple gene
In a cross between a red flowered plant and a white flowered plant, all offsprings produced bear pink flowers. This is because
Phenotypic and genotypic ratio in F$ _2$ generation in incomplete dominance is
What would be the proportion of dwarf plant with pink flowers. If heterozygous tall plant with pink flower is test crossed ? A plant taken for test cross character of length showing complete dominance and character of flower colour showing incompete dominance
Dominant and recessive alleles express themselves together in
Choose the correct answer from the alternatives given.
The allele for pea comb (P) in chickens is completely dominant to the allele for single comb (p). The alleles for black feather colour (B), and white feather colour (B) show codominance, so that BB individuals possess blue feathers. If chickens heterozygous for both pairs of genes are mated, what proportion of offspring are expected to be pea combed and white feathered?
Which of the following is not the Mendel's principle of inheritance?
$F _2$ generation in a Mendelian cross showed that both genotypic and phenotypic ratio are same as 1 : 2 : 1. It represents a case of
In Mirabilis jalapa , the percentage of plants having pink and red flowers would be ________ when pink flower plant is test crossed.
Different forms of a gene are called
A cross between yellow flowered and round fruit (both dominant) bearing plant and white flowered elongated fruit (both recessive) bearing plant yielded 20 plants in $F _1$ progeny which formed 960 plants in $F _2$ generation. The number of plants with yellow flowers and round fruits in $F _1$ and $F _2$ generations would be
Two plants of Summer Squash both having circular fruits are crossed. $F _1$ plants had discoid fruits. $F _2$ generation has 3 types of fruits, discoid, circular and long in the ratio of
A modified dihybrid mendelian ratio of 9 : 3 : 4 indicates