Question

If segregation of alleles does not occur during meiosis, which of the following will occur as a result?
A. Diploid gametes would result.
B. Gametes with one half of a homologous pair of chromosomes.
C. Crossing over between homologous pairs will not occur.
D. The chromosomes would demonstrate linkage.
E. The crossover percentage would be very small.

Answer 1

Hint: In the gamete cells meiosis division takes place.
During meiosis, the genetic material of the parent cells gets halved and divides.
Each of the gametes receives half of its parents’ genetic material to form a complete embryo after fertilization.

Complete answer: Every gene has two alleles.
1. Alleles are molecular variant forms of a gene.
2. Alleles are some genes that are located at the same position or locus of a chromosome.
3. Humans are diploid organisms because they have two alleles located at each genetic locus - one allele inherited from the father and another gene is inherited from the mother.
4. Alleles separate independently when gamete formation takes place – which is the law of segregation.
5. If segregation does not occur during the meiosis cell division, then one of the gametes will receive both the alleles and the other will receive none.
6. This segregation will produce a diploid gamete and a gamete with no allele.

So, the correct answer is option A. Diploid gametes would result.

Note: From the diagram we can see that P is an allele which is present on the chromosomes of father and mother and the allele is specific for eye color detection.