Draw a Punnett square for a female who is a heterozygote and a male who is a dominant homozygotes. What is the likelihood that this couple will have an offspring with Tay Sachs disease?
Draw a Punnett square for a female who is a heterozygote and a male who is a dominant homozygotes. What is the likelihood that this couple will have an offspring with Tay Sachs disease?
Genes are hereditary units in the DNA. These genes can be present in two versions called "dominant" and "recessive". If a gene can express itself even when half set of the gene (or cam say single copy of the gene) is present, then such a gene is called dominant. While, if a gene is only expressible when a complete set (or two copies of the same gene) are present, then it is called recessive. These two versions of genes are called Alleles.
Further, if an individual possesses the same copy of the genes that are, either both the genes are recessive, or both the genes are dominant, then that individual is said to be homozygous, while if it possesses one gene dominant and one recessive gene then it is called as heterozygote.
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