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Question
When two different genes came from the same parent they tend to remain together.
Write the observed phenotypic ratio.
Solution
Observed Pherotypic ratio 7 : 1: 1: 7
RELATED QUESTIONS
If the number of chromosomes in an endosperm cell is 27, what will be the chromosome number in the definitive nucleus?
- 9
- 18
- 27
- 36
Sketch and label the structure of chromosome.
Classify the chromosomes on the basis of position of centromere.
Distinguish between X and Y chromosomes.
Give an account of artificial chromosomes in the transfer of genetic material.
Short Answer Question.
Explain the chromosomal theory of inheritance.
An allohexaploidy contains
The A and B genes are 10 cm apart on a chromosome. If an AB/ab heterozygote is test crossed to ab/ab, how many of each progeny class would you expect out of 100 total progeny?
Write the salient features of the Sutton and Boveri concept.
Read the following statements regarding 'X and Y' chromosomes and select the correct option.
P - Due to presence of large amount of euchrornatin X chromosome is genetically more active.
Q - Due to presence of small amount of heterochromatin Y chromosome is genetically more active.
From the following identify the statements that are CORRECT with respect to homologous and non-homologous region of X and Y chromosomes.
i. Non-homologous region of X chromosome is longer and contains more genes than that of non-homologous region of Y chromosome.
ii. X-linked genes are present on nonhomologous region of X-chromosome.
iii. Y-linked genes are present on homologous region of Y-chromosome.
iv. Crossing over occurs only between homologous regions of X and Y chromosomes.
A gene pair hides the effect of another. The phenomenon is ______.
Which of the following statements indicates parallelism in genes and chromosomes?
- They occur in pairs.
- They segregate during gamete formation.
- They show linkage.
- Independent pairs segregate independently.
What do you mean by locus?
Genes located on same locus but having different expressions are:
How do genes and chromosomes share similarity from the point of view of genetical studies?
In a karyotype analysis, X and Y chromosomes represent sex chromosomes.
Name the scientist who discovered the X chromosome.
