Question

A quantitative trait is controlled by 7 genes. Which of the following will hold true?​

1. A single cross between two heterozygotes will give 14 phenotypic classes with two individuals each under the two homozygotes

2. A single cross between two heterozygotes will give 15 phenotypic classes with one individual each under the two homozygotes

3. The phenotypic classes will be variable with each representing a unique phenotype

Answer 1

Answer:

Genes come in different varieties, called alleles. Somatic cells contain two alleles for every gene, with one allele provided by each parent of an organism. Often, it is impossible to determine which two alleles of a gene are present within an organism's chromosomes based solely on the outward appearance of that organism. However, an allele that is hidden, or not expressed by an organism, can still be passed on to that organism's offspring and expressed in a later generation.