A defective gene leads to major defect in the offspring. This is a/an_________ factor affecting health.

Keep practicing — related questions

• If both parents are ____ and an offspring is affected, the trait must be recessive.
• The differences in some of the traits of children from their parents are due to ______.
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• Diseases that are transmitted from parent to offspring from generation to generation are termed as _____.
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• The human traits are influenced by DNA of ___.
• __________ occurs due to change in gene frequency, due to accumulation of a particular type of gene.
• Down’s syndrome is caused by an extra copy of chromosome number 21. What percentage of offsprings produced ...