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प्रश्न
Define the following:
test cross.
What is test cross?
उत्तर
Test cross: The cross between F1 hybrid and its homozygous recessive parent is called a test cross.
संबंधित प्रश्न
Write the scientific name of the organism Thomas Hunt Morgan and his colleagues worked with for their experiments. Explain the correlation between linkage and recombination with respect to genes as studied by them.
How did Sturtevant explain gene mapping while working with Morgan?
Answer the following question.
Explain linkage and recombination as put forth by T.H. Morgan based on his observations with the Drosophila melanogaster crossing experiment.
Very Short Answer Question.
Give one example of complete sex linkage?
What is a linkage? How many linkage groups do occur in human being?
Give an example of complete linkage.
How many linkage groups are present in Drosophila melanogaster?
______ results in separation of linkage groups during meiosis.
Analyse the following statements with respect to complete sex linkage and select the correct option.
- It is exhibited by genes located on non-homologous regions of X and Y chromosomes
- Y-linked trait is hypertrichosis.
- X-linked traits are haemophilia, red-green colour blindness, myopia (near sightedness).
The genetic map distance between two genes located on the same chromosome can be analyzed by calculating ____________.
All the linked genes in a particular chromosome, constitute a ____________.
Analyze the following statements and select the correct option.
- Due to incomplete linkage, the parental traits are inherited in offsprings.
- Due to incomplete linkage, new traits occur in offsprings.
- X chromosome of Drosophila males show complete linkage.
- In Zea mays - colour and shape of grain show complete linkage
The contrasting pairs of factors in Mendelian crosses are called ______.
Crossing over in diploid organism is responsible for ______.
Two crosses between the same pair of genotypes or phenotypes in which the sources of the gametes are reversed in one cross, is known as ______.
Mr. Kapoor has Bb autosomal gene pair and d allele sex-linked. What shall be proportion of Bd in sperms?
What will be the distribution of phenotypic features in the first filial generation after a cross between a homozygous female and a heterozygous male for a single locus?
Which of the following is correct for the condition when plant YyRr is back crossed with the double recessive parent?
The following are results of crossing a female fly (AaBb) with a male fly (aabb).
- AaBb 1005
- aabb 1000
- Aabb 200
- aaBb 210
Which two genotypes are the recombinant offspring?
