CH-22 Variation & Genetics

Two carriers of albinism have four children. One of their children is albino and the remaining three are normally pigmented. What is the probability that their next child will be albino?

Which of the following is an example of dihybrid cross?

Which of the following incorrectly identifies the mode of inheritance for the given genetic disease?

Approximately how many human single gene traits and illness are currently known from medical reports?

In which genotype is normally not found in a gamete?

Two phenotypically normal individuals have an affected child. What can we conclude about the parents?

Consider a group of 100 individual [50 couples], all of whom carry a recessive disease allele. If 200 children were born to these couples, what percentage of the children would ,theoretically, be carriers like their parents?

Consider the cross AaBb x AaBb. If the alleles for both genes exhibit complete dominance, what genotypic ratio is expected in the resulting offspring?

Achondroplasia is a dominant form of dwarfism.what is the chance of having an unaffected child from two?

Female and male sex cells are called:

What is the major value in using a Punnett square?

The branch of biology dealing with the principles that explain the similarities between parents and their progeny and differences among individuals of a species:

A recessive gene can be expressed if the genotype is:

If an Organism with the genotype Ww is crossed with a Ww Organism, what would be the propagation proportion of offspring that would be heterozygous?

Phenotype is:

In humans, brown eyes B is dominant to blue eyes b.A brown eyed man marries a blue eyed woman. The possible eye colours of their children are:

If an individual has a recessive phenotype for a given trait, the genotype must:

The part of DNA which controls a specific character is:

The form of appearance of trait is:

True breeding variety is:

The organisms produced by self cross differing in one character's are:

Law of segregation suggests that each gamete has:

A sample population of hundred plants has number of alleles:

The work of Mendel was rediscovered after how many years of his death is?

Match particulate hereditary factor of Mendel which one of the followings:

If test cross gives all dominant character it means the parent is:

In test cross if the parent whose genotype is to be determined is heterozygous then it gives:

Blood group MN has antigen:

The blood group without antibody is:

Who for the first time found white eye mutation in Drosophila?

Both husband and wife have blood group A. Which of the following blood groups can be present in their offspring?

The gametes of F1 are formed in ratio:

If there is cross between round and yellow with wrinkle and green, the F2 will give wrinkle green in ratio of:

The genes that expressed in heterozygous conditions show:

A parent has blood group A the other has blood group AB Bombay phenotype will be produced in offspring with blood group:

Which of the followings is not continuously varying trait?

The phenomenon in which genes are present on the same chromosome is:

Queen Victoria was carrier of haemophilia but his husband was normal. The ratio of haemophilic Princes can be:

A normal woman, whose father was colour blind, marries a colour blinded man. The ratio of their children for colour blindness can be:

The text cross gives the ratio 1:1. The individual whose genotype is to be determined is: