Question

Biometric genetics is connected with
A. Effect of radiations on living organisms
B. Biochemical explanation of genetic phenomena
C. Effect of the environment on genetic set up of organisms
D. Inheritance of quantitative traits

Answer 1

Hint: Genetics is a vast field with multiple disciplines, and one such discipline would be the study of traits passed onto the offsprings, which is otherwise known as biometric genetics. This study mostly involves statistical analysis of various characteristic phenotypes in both plants and animals and how they are inherited from one generation to the other.

Complete answer: Biometric or biometrical genetics is the study of how many notable phenotypes have been passed on to the offsprings from one generation to the other. It is an important class of study, as it helps understand the various processes of recombination and inheritance. This study is usually done by employing various statistical tools to identify the various phenotypic traits being passed on. Other factors such as the relative importance of genetic and environmental factors influencing that trait, and how factors such as assortative mating, gene-environment correlation, and genotype/environment interaction influence them. All statistical tools used are based on Mendelian principles. It involves the study of the inheritance of quantitative traits being passed in both plants and animals.
a) The study of the effect of radiation on living organisms is termed as mutation studies and it does not have anything to do with a study of inheritance.
b) The study of the biochemical aspect of the genetic phenomenon is known as molecular genetics. Molecular genetics primarily deals with DNA and other molecular aspects of genetics.
Thus, the correct answer is option D.

Note: The study of the effect on the environment on the genetic step-up of organisms is known as epigenetic studies. Here, the influence of environmental factors on genetics and how the genetic changes have helped the organism cope with the environmental factors are studied.