diff --git a/package.json b/package.json
index ca5067a..c5bb570 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@indec/form-builder",
-  "version": "1.6.0",
+  "version": "1.7.0",
   "description": "Form builder",
   "main": "index.js",
   "private": false,
diff --git a/src/components/Checkbox/Checkbox.js b/src/components/Checkbox/Checkbox.js
index 70647a8..8f090aa 100644
--- a/src/components/Checkbox/Checkbox.js
+++ b/src/components/Checkbox/Checkbox.js
@@ -37,7 +37,7 @@ function Checkbox({
           {getSelectedOptions(options, field.value)}
         </Typography>
       ) : (
-        <FormGroup row>
+        <FormGroup>
           {options.map((option, index) => (
             <FormControlLabel
               key={option.value}
diff --git a/src/components/FieldMessage/FieldMessage.js b/src/components/FieldMessage/FieldMessage.js
index db93f32..f6be670 100644
--- a/src/components/FieldMessage/FieldMessage.js
+++ b/src/components/FieldMessage/FieldMessage.js
@@ -4,7 +4,7 @@ import Alert from '@mui/material/Alert';
 import {formikField, formikForm} from '@/utils/propTypes';
 import hasFormikErrorsAndWarnings from '@/utils/hasFormikErrorsAndWarnings';
 
-const alertStyles = {width: '100%', justifyContent: 'center', mt: 2};
+const alertStyles = {justifyContent: 'center', mt: 2};
 
 function FieldMessage({
   form, field, readOnly, warnings
diff --git a/src/components/FormBuilder/FormBuilder.stories.js b/src/components/FormBuilder/FormBuilder.stories.js
index 7584fdb..9f9b983 100644
--- a/src/components/FormBuilder/FormBuilder.stories.js
+++ b/src/components/FormBuilder/FormBuilder.stories.js
@@ -156,6 +156,7 @@ const sections = [
     label: 'Sección 2',
     questions: [
       {
+        id: 1,
         label: 'Select the correct option',
         name: 'S2P1',
         number: '1',
diff --git a/src/components/QuestionBuilder/QuestionBuilder.js b/src/components/QuestionBuilder/QuestionBuilder.js
index 511695b..9ec9aa0 100644
--- a/src/components/QuestionBuilder/QuestionBuilder.js
+++ b/src/components/QuestionBuilder/QuestionBuilder.js
@@ -15,9 +15,9 @@ import Wrapper from './Wrapper';
 
 const mapSubQuestions = ({
   sectionName, sectionIndex, questionName, subQuestions
-}) => subQuestions.map((subQuestion, index) => ({
+}) => subQuestions.map(subQuestion => ({
   ...subQuestion,
-  name: `${sectionName}.${sectionIndex}.${questionName}.specifications.${index}.answer.value`
+  name: `${sectionName}.${sectionIndex}.${questionName}.answer.specifications.${subQuestion.name}.answer.value`
 }));
 
 const getComponent = (section, sectionIndex, questionIndex, readOnlyMode, warnings, values) => {
@@ -26,11 +26,11 @@ const getComponent = (section, sectionIndex, questionIndex, readOnlyMode, warnin
     return null;
   }
   let QuestionComponent;
-  const questionName = `${section.name}.${sectionIndex}.${question.name}.answer.value`;
+  const questionName = `${section.name}.${sectionIndex}.${question.name}.answer`;
   const isRequired = question.validations.some(validation => validation.type === 'required');
   const label = `${question.number} - ${question.label}`;
   const isMultiple = question.multiple;
-  const subQuestions = question.subQuestions.length > 0
+  const subQuestions = question.subQuestions && question.subQuestions.length > 0
     ? mapSubQuestions({
       sectionName: section.name, sectionIndex, questionName: question.name, subQuestions: question.subQuestions
     })
diff --git a/src/components/QuestionBuilder/Wrapper.js b/src/components/QuestionBuilder/Wrapper.js
index d2e5c77..330e720 100644
--- a/src/components/QuestionBuilder/Wrapper.js
+++ b/src/components/QuestionBuilder/Wrapper.js
@@ -40,13 +40,18 @@ function Wrapper({
       />
     );
   } else {
-    Component = <FastField {...props} options={options} name={name} readOnlyMode={readOnlyMode} />;
+    Component = <FastField {...props} options={options} name={`${name}.value`} readOnlyMode={readOnlyMode} />;
   }
   if (subQuestions.length > 0 && options.length > 0) {
     Component = (
       <>
         {Component}
-        <SubQuestions values={values} subQuestions={subQuestions} readOnlyMode={readOnlyMode} Component={TextField} />
+        <SubQuestions
+          values={values}
+          subQuestions={subQuestions}
+          readOnlyMode={readOnlyMode}
+          Component={TextField}
+        />
       </>
     );
   }
@@ -57,7 +62,11 @@ Wrapper.propTypes = {
   isMultiple: PropTypes.bool.isRequired,
   name: PropTypes.string.isRequired,
   values: valuesPropTypes.isRequired,
-  subQuestions: PropTypes.arrayOf(subQuestionPropTypes).isRequired
+  subQuestions: PropTypes.arrayOf(subQuestionPropTypes)
+};
+
+Wrapper.defaultProps = {
+  subQuestions: []
 };
 
 export default Wrapper;
diff --git a/src/components/Radio/Radio.js b/src/components/Radio/Radio.js
index 3ad86e3..5fb3149 100644
--- a/src/components/Radio/Radio.js
+++ b/src/components/Radio/Radio.js
@@ -20,7 +20,7 @@ function Radio({
       {readOnlyMode ? (
         <Typography>{getSelectedOptionLabel(options, field.value)}</Typography>
       ) : (
-        <RadioGroup row {...field}>
+        <RadioGroup {...field}>
           {options.map(option => (
             <FormControlLabel key={option.value} value={option.value} control={<MuiRadio />} label={option.label} />
           ))}
diff --git a/src/components/SubQuestions/SubQuestions.js b/src/components/SubQuestions/SubQuestions.js
index 20dc855..6627c21 100644
--- a/src/components/SubQuestions/SubQuestions.js
+++ b/src/components/SubQuestions/SubQuestions.js
@@ -1,31 +1,30 @@
 import PropTypes from 'prop-types';
 import {FastField} from 'formik';
+import Box from '@mui/material/Box';
 
 import castArray from '@/utils/castArray';
 import subQuestionPropTypes from '@/utils/propTypes/subQuestion';
 import valuesPropTypes from '@/utils/propTypes/values';
 
 function SubQuestions({values, subQuestions, readOnlyMode, Component}) {
-  const specifications = values.specifications.filter(
-    specification => castArray(values.answer.value).includes(specification.optionId.toString())
+  const selectedQuestions = subQuestions.filter(
+    subQuestion => castArray(values.answer.value).includes(subQuestion.optionId.toString())
   );
   return (
     <>
-      {specifications.map(specification => {
-        const subQuestion = subQuestions.find(
-          currentSubQuestion => currentSubQuestion.optionId === specification.optionId
-        );
+      {selectedQuestions.map(subQuestion => {
         const isRequired = subQuestion.validations.some(validation => validation.type === 'required');
         return (
-          <FastField
-            key={specification.id}
-            component={Component}
-            name={subQuestion.name}
-            label={subQuestion.label}
-            placeholder={subQuestion.placeholder}
-            required={isRequired}
-            readOnlyMode={readOnlyMode}
-          />
+          <Box key={subQuestion.id} mb={2}>
+            <FastField
+              component={Component}
+              name={subQuestion.name}
+              label={subQuestion.label}
+              placeholder={subQuestion.placeholder}
+              required={isRequired}
+              readOnlyMode={readOnlyMode}
+            />
+          </Box>
         );
       })}
     </>
diff --git a/src/utils/buildQuestions.js b/src/utils/buildQuestions.js
index 788567f..2080c56 100644
--- a/src/utils/buildQuestions.js
+++ b/src/utils/buildQuestions.js
@@ -21,6 +21,15 @@ const getAnswerValueType = question => {
   return answer;
 };
 
+const getSubQuestions = subQuestions => subQuestions.reduce((accumulator, currentValue, currentIndex) => {
+  accumulator[currentValue.name] = {
+    id: currentIndex + 1,
+    optionId: currentValue.optionId,
+    answer: {value: ''}
+  };
+  return accumulator;
+}, {});
+
 const buildQuestions = section => {
   const values = {[section.name]: {id: 1}};
   if (section.interruption.interruptible) {
@@ -32,14 +41,13 @@ const buildQuestions = section => {
     if (question.multiple) {
       values[section.name][question.name] = {id, answer: [{id: 1, value: getAnswerValueType(question)}]};
     }
-    if (question.subQuestions.length > 0) {
+    if (question.subQuestions && question.subQuestions.length > 0) {
       values[section.name][question.name] = {
         ...values[section.name][question.name],
-        specifications: question.subQuestions.map(
-          (subQuestion, index) => ({
-            id: index + 1, optionId: subQuestion.optionId, answer: {value: ''}
-          })
-        )
+        answer: {
+          ...values[section.name][question.name].answer,
+          specifications: getSubQuestions(question.subQuestions)
+        }
       };
     }
   });
diff --git a/src/utils/buildYupSchema.js b/src/utils/buildYupSchema.js
index 739c198..95cd492 100644
--- a/src/utils/buildYupSchema.js
+++ b/src/utils/buildYupSchema.js
@@ -2,6 +2,7 @@ import * as Yup from 'yup';
 
 import dateTypes from '@/constants/dateTypes';
 import questionTypes from '@/constants/questionTypes';
+import castArray from '@/utils/castArray';
 
 const getValidatorType = (type, options, {isRequired, message, metadata}) => {
   let validator;
@@ -69,10 +70,43 @@ const handleValidations = ({validator, validations, type, opts}) => {
   return newValidator;
 };
 
+const buildSubQuestionsValidations = (subQuestions, opts) => subQuestions.reduce((acc, currentValue) => {
+  let subQuestionValidator = Yup.string();
+  const subQuestionValidations = currentValue.validations;
+  subQuestionValidator = handleValidations({
+    validator: subQuestionValidator,
+    validations: subQuestionValidations,
+    type: currentValue.type,
+    opts
+  });
+  acc[currentValue.name] = Yup.object({answer: Yup.object({value: subQuestionValidator})});
+  return acc;
+}, {});
+
+const buildAnswerObj = ({values, subQuestions, validator, multiple, opts}) => {
+  const defaultSchema = multiple ? Yup.array().of(
+    Yup.object({
+      id: Yup.number().required(),
+      value: validator
+    })
+  ) : Yup.object({value: validator});
+  if (subQuestions.length > 0) {
+    const selectedQuestions = buildSubQuestionsValidations(subQuestions.filter(
+      subQuestion => castArray(values.value).includes(subQuestion.optionId.toString())
+    ), opts);
+    return defaultSchema.concat(
+      Yup.object({
+        specifications: Yup.object(selectedQuestions)
+      })
+    );
+  }
+  return defaultSchema;
+};
+
 export default function buildYupSchema(schema, config, opts = {}) {
   const schemaWithValidations = schema;
   const {
-    name, type, validations, options, metadata, multiple
+    name, type, validations, options, metadata, multiple, subQuestions = []
   } = config;
   const requiredField = validations.find(validation => validation.type === 'required');
   let validator = getValidatorType(
@@ -90,9 +124,7 @@ export default function buildYupSchema(schema, config, opts = {}) {
   validator = handleValidations({validator, validations, type, opts});
   schemaWithValidations[name] = Yup.object({
     id: Yup.number().required(),
-    answer: Yup.object({
-      value: multiple ? Yup.array().of(Yup.object({id: Yup.number(), value: validator})) : validator
-    })
+    answer: Yup.lazy(values => buildAnswerObj({values, type, subQuestions, validator, multiple, opts}))
   });
   return schemaWithValidations;
 }
diff --git a/src/utils/propTypes/values.js b/src/utils/propTypes/values.js
index 4be4a87..db07ff3 100644
--- a/src/utils/propTypes/values.js
+++ b/src/utils/propTypes/values.js
@@ -20,10 +20,9 @@ export default PropTypes.shape({
       })
     )
   ]),
-  specifications: PropTypes.arrayOf(
-    PropTypes.shape({
-      optionId: PropTypes.number,
-      name: PropTypes.string
-    })
-  )
+  specifications: PropTypes.shape({
+    optionId: PropTypes.number,
+    name: PropTypes.string,
+    answer: PropTypes.shape({value: PropTypes.string})
+  })
 });