Assume that investigators crossed a strain of flies carrying the dominant eye mutation Lobe on the second chromosome with a strain of homozygous for the second chromosome recessive mutations smooth abdomen and straw body. The F1 lobe females were then backcrossed with homozygous smooth abdomen, straw body males, and the following phenotypes were observed: Show Smooth abdomen, straw body 820 Give the gene order and map units between these three loci. How does the environment affect heredity?Sometimes the environment changes a gene—either its DNA sequence or its activity level. Either of these effects can change the proteins that are made from a gene, which in turn affects traits. Some harmful environmental factors can change a gene's nucleotide sequence. For example, UV radiation can break DNA strands.
How does heredity and environment affect development?Heredity sets the upper limit of what an individual can attain, while environment affects the degree to which the potentialities can be realized.
What characteristics are caused by heredity environment?Parents pass on traits or characteristics, such as eye colour and blood type, to their children through their genes. Some health conditions and diseases can be passed on genetically too. Sometimes, one characteristic has many different forms. For example, blood type can be A, B, AB or O.
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Which of the following describes the way in which an environment can limit the effects of heredity?
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