AaBbCc is parent generation . how many types of gametes will be formed in Incomplete linkage and Complete linkage .?

Question

AaBbCc is parent generation . how many types of  gametes will be formed in Incomplete linkage and Complete linkage .?

Answer

In incomplete linkage ----types of gametes are 2^3 = 8 in complete linkage -----types of gametes are 2^2=4 hope it help.......

Answer

Yes u are right but in this que 4 gametes are formed in complete linkage ... but I also don't get it.how??

Answer

8 different types of gametes will formed (ABC, ABc, AbC, Abc aBC, aBc, abC,  abc)   thank u.

Answer

8

Answer

Incomplete Linkage:
Incomplete linkage refers to a situation where two or more genes are present on the same chromosome but do not show complete linkage or complete independent assortment. In other words, the genes are not completely linked and have a certain degree of crossing over during meiosis.

Types of Gametes in Incomplete Linkage:
In incomplete linkage, four types of gametes are formed due to the crossing over between the linked genes. The types of gametes can be determined by analyzing the recombination frequency or the percentage of recombinant offspring produced.

1. Parental Gametes: These gametes contain the same combination of alleles as the parental generation (AaBbCc). There is no crossing over between the linked genes, so the alleles remain in their original arrangement.

2. Single Crossover Gametes: These gametes result from a single crossover event between the linked genes. The crossover occurs between two homologous chromosomes, resulting in the exchange of genetic material. For example, if the crossover occurs between genes A and B, the resulting gametes will be AbBcC and aBbcC.

3. Double Crossover Gametes: These gametes result from two crossover events between the linked genes. The crossovers occur at different positions on the homologous chromosomes, leading to the exchange of genetic material in two regions. For example, if the crossovers occur between genes A and B, and B and C, the resulting gametes will be AbbcC and aBbCc.

4. Non-crossover Gametes: These gametes do not undergo any crossover event and retain the original combination of alleles as the parental generation (AaBbCc).

Complete Linkage:
Complete linkage refers to a situation where two or more genes are present on the same chromosome and show complete linkage or complete association. In other words, the genes are tightly linked and do not undergo crossing over during meiosis.

Types of Gametes in Complete Linkage:
In complete linkage, only two types of gametes are formed, which are the same as the parental genotypes. Since there is no crossing over between the linked genes, the alleles remain in their original arrangement.

1. Parental Gametes: These gametes contain the same combination of alleles as the parental generation (AaBbCc). The genes are tightly linked, and there is no crossing over, so the alleles remain in their original arrangement.

2. Non-crossover Gametes: These gametes do not undergo any crossover event and retain the original combination of alleles as the parental generation (AaBbCc).

Conclusion:
In summary, incomplete linkage results in the formation of four types of gametes, including parental gametes, single crossover gametes, double crossover gametes, and non-crossover gametes. On the other hand, complete linkage only produces two types of gametes, which are the same as the parental genotypes. The formation of different types of gametes in incomplete linkage is due to the crossing over between the linked genes during meiosis.

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