Biology NEET - XII: Chapter 5- Principles of Inheritance and Variations Part 2
Gregor Mendel selected 14 true-breeding pea plant varieties, with two contrasting traits for each of the seven characteristics he studied (e.g., tall vs. dwarf, round vs. wrinkled seeds). These varieties consistently passed down specific traits, allowing Mendel to observe inheritance patterns clearly across generations.
Palmar crease is the symptom of which disease?
Down's syndrome
Key Terms
Palmar crease is the symptom of which disease?
Down's syndrome
Edward's syndrome is caused due to
Trisomy of chromosome 18
Horse shoe shaped kidney is a symptom of
Edward's syndrome
Patau's syndrome occurs due to
Trisomy of chromosome 13
Cry-du-chat syndrome is caused due to
Deletion of shorter arm of chromosome 5
Moon like face and receding chin are symptoms of
Cry-du-chat syndrome
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| Term | Definition |
|---|---|
Palmar crease is the symptom of which disease? | Down's syndrome |
Edward's syndrome is caused due to | Trisomy of chromosome 18 |
Horse shoe shaped kidney is a symptom of | Edward's syndrome |
Patau's syndrome occurs due to | Trisomy of chromosome 13 |
Cry-du-chat syndrome is caused due to | Deletion of shorter arm of chromosome 5 |
Moon like face and receding chin are symptoms of | Cry-du-chat syndrome |
What is the sex of a person with Klinefelter's syndrome? | Male |
What is genetic compliment of Jacob's syndrome? | 44+ XYY |
What is known as black urine disease? | Alkaptonuria |
The gene for phenyl ketonuria is located on | Chromosome 12 |
Mutated gene in albinism is present on which chromsome? | Long arm of chr-11 or chr-15 |
Tay-sachs disease is caused due to the accumulation of | Sphingolipids |
Gaucher's disease is caused due to the accumulation of | Cerebroside |
Which disease is known as Cooley's anaemia? | Thalassemia |
Cystic fibrosis is caused by mutation in a gene present on chromosome | 7 |
What is achondroplasia? | Dwarfism |
What is polydactyly? | Presence of extra fingers |
THe mutated gene in Huntington's chorea is located on | CHromosome 4 |
Haemophilia A is caused due to absence of which clotting factor in body? | Factor VIII- Anti-haemophilic factor A |
Haemophilia B is caused due to the absence of which clotting factor in body? | Factor IX |
What is red colour blindness called? | Protanopia |
What is green colour blindness callled? | Deuteranopia |
What is blue colour blindness called? | Triatonopia |
What is non criss cross inheritance? | Transfer of traits through members of same sex |
What is criss cross inheritance? | Transfer of traits through members of opposite sex |
What is holandric inheritance? | Only males are affected |
Cytoplasmic inheritance can occur through | Mitochondria and plastids |
Inheritance of kappa particles in paramecium is an example of which type of inheritance? | Cytoplasmic inheritance |
Who gave the term crossing over? | Morgan |
What is frequency of recombination? | (Number of recombinants/total number of offsprings) X 100 |
What can be the maximum value of recombinant frequency? | 50% |
What is a linkage group? | The set of all genes on a chromosome |
What is the ploidy of a genome? | n (haploid set of chromosomes) |
What is autopolyploidy? | Increase in genomic number of same genome |
What is allopolyploidy? | Hybridisation between two species followed by doubling of chromosomes |
What are gynandromorphs? | Half the body of organism is male and half female |
What is a free martin? | Infertile female cattle with masculinized behaviour which originates by acquiring male component in uterus through male twin |