# How many types of gametes are produced by two genes AaBb showing linkage?

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## What is the probability that parents AaBb and AaBb will have offspring with genotype AaBb?

The correct answer: The probability of an aabb offspring when AaBb x AaBb parents are crossed is b. 1/16 .

## What are the types of gametes that can be produced by an individual with the genotype AaBbCc?

The plant having genotype AABbCC is heterozygous for only one character B. Number of “gametes = 2n”, where n is the heterozygosity.” Since n = 1 so 2 gametes will be formed. Those are ABC and AbC. So the two types of gametes will be ABC and AbC.

## How many types of gametes are produced by genotype AaBbCc if all genes are linked?

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No. of homologous chromosome pairs (heterozygous genes) No. of different gametes from each parent
3 (AaBbCc X AaBbCc) 8 (23)
4 (AaBbCcDd X AaBbCcDd) 16 (24)
20 pairs of chromosomes 1,048,576 (220)
23 pairs of chromosomes 8,388,608 (223)

## How many different types of gametes would be produced by an organism of genotype AaBbCcDdEe if all of the genes assort independently?

The number of different possible gametes produced by the diploid genotype (AaBbCcDdEe) is 2 x 2 x 2 x 2 x 2 = 32 (2 for each pair of heterozygous genes).

## How many types of gametes are produced by a diploid organism if it is heterozygous for 3 loci?

Types of gametes =2n where n is number of heterozygous loci. Thus, gametes produced by a diploid organism could be 24=16.

1 : 1 : 1 : 1.