Part A<\/p>\n
Couple 1 comes into your office. The husband has normal vision; the wife is heterozygous for the color-blindness allele.<\/p>\n
What percentage of Couple 1’s male offspring will be color blind? What percentage of their female offspring will be color blind?<\/p>\n
Part B<\/p>\n
Couple 2 comes into your office. The husband is color blind; the wife is homozygous for the normal vision allele.<\/p>\n
What percentage of Couple 2’s male and female offspring will be color blind?<\/p>\n
Part C<\/p>\n
Couple 3 comes into your office. The husband is color blind; the wife is heterozygous for the color-blindness allele.<\/p>\n
What percentage of Couple 3’s male and female offspring will be color blind?<\/p>\n
Part D<\/p>\n
Review the results you obtained for the female offspring of the three couples.<\/p>\n
Based on your results for the female offspring, predict whether color blindness is a dominant or recessive trait. Explain your reasoning.<\/p>\n
Part E<\/p>\n
Complete the Punnett squares below to determine the possible genotypes of each couple’s male and female offspring. (X represents the normal color vision allele. X represents the color-blindness allele. Y represents the Y chromosome, which does not carry the color-vision gene.)<\/p>\n
Part F<\/p>\n
Review the results you obtained for the female offspring of all three couples. Then, look at the female offspring (the offspring with two X chromosomes) in your three Punnett squares.<\/p>\n
What genotype must a female child have in order to be color blind?<\/p>\n
Part G<\/p>\n
Review the results you obtained for the male offspring of all three couples. Then, look at the male offspring (the offspring with a Y chromosome) in your three Punnett squares.<\/p>\n
What genotype must a color-blind male have? Explain.<\/p>\n
Part H<\/p>\n
Think it over<\/p>\n
Explain why color blindness occurs more commonly in males than females.<\/p>\n
Part I<\/p>\n
Based on your Punnett squares, determine whether a son can inherit color blindness from his father. Explain your reasoning.<\/p>\n","protected":false},"excerpt":{"rendered":"
Part A Couple 1 comes into your office. The husband has normal vision; the wife is heterozygous for the color-blindness allele. What percentage of Couple 1’s male offspring will be color blind? What percentage of their female offspring will be Read More …<\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[],"tags":[],"class_list":["post-370","post","type-post","status-publish","format-standard","hentry"],"_links":{"self":[{"href":"https:\/\/www.benedictsol.com\/blogs\/wp-json\/wp\/v2\/posts\/370","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.benedictsol.com\/blogs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.benedictsol.com\/blogs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.benedictsol.com\/blogs\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.benedictsol.com\/blogs\/wp-json\/wp\/v2\/comments?post=370"}],"version-history":[{"count":0,"href":"https:\/\/www.benedictsol.com\/blogs\/wp-json\/wp\/v2\/posts\/370\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.benedictsol.com\/blogs\/wp-json\/wp\/v2\/media?parent=370"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.benedictsol.com\/blogs\/wp-json\/wp\/v2\/categories?post=370"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.benedictsol.com\/blogs\/wp-json\/wp\/v2\/tags?post=370"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}