The average annual snowfall amount is 37 inches (949 mm). Average daily highs are around 30 - 38Â°F (-1Â°C - 3Â°C). Springtime in Chicago means blooming flowers and a lively lakefront. Temperatures really start to warm up with April typically in the 50's Â°F (10-15Â°C) and May up to around 70Â°F (21Â°C). Rainfall averages 3.5 - 3.8 inches (92 - 94mm). Summers in Chicago are warm with average daytime temperatures around 78Â°F to 92Â°F (26Â°C - 33Â°C). Rainfall averages range from 3.7 - 4.3 inches (94 to 109mm). It's cooler near the lake, and June is typically the wettest month of the year.
Answer: There's no simple answer to this question. Some abnormal genes are associated with an increased risk of breast cancer. In families that have an abnormal gene, it can be passed down from a parent to a child. Only 10% (1 in 10) of women with breast cancer have inherited an abnormal breast cancer gene.
Genetic risk factors. About 5% to 10% of breast cancer cases are thought to be hereditary, meaning that they result directly from gene defects (called mutations) inherited from a parent. BRCA1 and BRCA2: The most common cause of hereditary breast cancer is an inherited mutation in the BRCA1 and BRCA2 genes. People with this syndrome have an increased risk of breast cancer, as well as several other cancers such as leukemia, brain tumors, and sarcomas (cancers of bones or connective tissue). 2  This is a rare cause of breast cancer. 3  CHEK2: The Li-Fraumeni syndrome can also be caused by inherited mutations in the CHEK2 gene.