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प्रश्न
Explain codominance in colour coat in cattle with checker board method.
उत्तर
- Coat colour in cattle is a classic example of co-dominance.
- There are two types, one with a red coat (skin with red colour hair) and the other with a white coat (with white hair).
- When red cattle (RR) is crossed with white cattle (WW), F1 hybrids (RW) have roan colour. Roans have a mixture of red and white colour hair.
- Thus, both traits are expressed equally. In F2 generation (produced by interbreeding of roans), red (RR), roans (RW) and white (WW) are produced in the ratio 1: 2: 1.
Phenotypic ratio → 1 : 2 : 1 (1 Red coat : 2 Roan : 1 White coat)
Genotypic ratio → 1 : 2 : 1 (1 RR : 2 RW : 1 WW)
संबंधित प्रश्न
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.
Define the Homologous chromosomes
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?
Changing the codon AGC to AGA represents
From the following identify the INCORRECT statement/s with respect to the chromosomes.
i. Chromosomes are capable of self replication and play vital role in heredity, mutation, variation, and evolutionary development of eukaryotic species.
ii. Chromosomes are visible during cell division.
iii. Chemically eukaryotic chromosomes are made of mRNA, histone and non-histone proteins.
iv. The number of chromosomes varies within the population of a particular species.
At secondary constriction I, ______ becomes organized during interphase.
Mendel’s work was rediscovered by three scientists in the year ______.
How many types of gametes would be produced if the genotype of a parent is AaBB?
