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प्रश्न
Appearance of new combinations in F2 generation in a dihybrid cross proves the law of_____________ .
- dominance
- segregation
- independent assortment
- purity of gametes
उत्तर
(c) independent assortment
According to the law of independent assortment, the distribution of alleles of different traits is independent of their original combinations in the parents.
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संबंधित प्रश्न
Give appropriate biological/technical terms for the following:
The suppressed allele of a gene.
Give appropriate biological/technical terms for the following:
A pair of corresponding chromosomes of the same size and shape, one from each parent.
Define the following:
Allele
A family consists of two parents and their five children and the pedigree chart below shows the inheritance of the trait colour blindness .
(i) Who is colour blind in parents - Father or Mother?
(ii) How many daughters and sons have beeen born in the family?
(iii) What does the child 1 indicate about this trait?
(iv) Complete the depiction of all probabilities of the trait among the children 2-5 in the chart.
(v) On which chromosome is the gene of this trait located?
(vi) Name one other trait in humans which follows the similar mode of inheritance.
Give Technical Term:
The hereditary unit, which is responsible for inheritance.
In the following crosses write the characteristics of the progeny
| Cross | Progeny |
| (a) RR YY × RR YY | __________________ |
| Round, yellow Round, yellow | __________________ |
| (b) Rr Yy × Rr Yy | __________________ |
| Round, yellow Round, yellow | __________________ |
| (c) rr yy × rr yy | __________________ |
| wrinkled, green wrinkled, green | __________________ |
| (d) RR YY × rr yy | __________________ |
| Round, yellow wrinkled green | __________________ |
Give the basic features of the mechanism of inheritance.
The F1 generation has all tall, and F2 ratio 3 : 1, it proves:
Do you think Mendel’s laws of inheritance would have been different if the characters that he chose were located on the same chromosome.
The maternal grandfather of a boy is colorblind, but his maternal grandmother is normal. The father of the boy is also normal. What is the probability of this boy being colorblind?
