Travis and Marcy, a Caucasian couple, are pregnant with their first child. Travis has a prior child with cystic fibrosis (autosomal recessive). He has refused to pursue carrier testing but Marcy has had negative carrier testing. Note: Carrier testing can identify 90% of carriers of CF accurately and approximately 1/25 Caucasian's are carriers of CF. What is the chance they will have a child with CF? 1/140 1/25 1/964 Need it ASAP please

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Complete each sentence with the appropriate term or phrase. dependent on The maternal effect refers to the fact that the phenotype of the offspring is depenedent on the mother. 75% dextral and 25% sinistral of the 1:2:1 Maternal effect genes such as those that control snail shell twisting code for proteins that are 100% dextral independent of With maternal effect genes, the phenotype of the offspring is genotype of the father. the deposited in the egg With maternal effect genes, the ratios of progeny that have right or left handed twisting can be predicted since the inheritance of the alleles follows genotype 100% sinistral In a mating of two Dd snails the phenotypic Mendel's law of ratio will be and the assortment genotypic ratio will be 2:1 Mendel's law of segregation Reset

Finally, draw out a Punnett square to help you consider the cross between these possible gametes. Sex-Linked1 := Homework • Unanswered What are the possible genotypes of the offspring shown in your Punnett square? Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. XBxb and xbY a b XBXB and xbY Neither of these answers is correct Unanswered • 1 attempt left Submit Sex-Linked2 Homework • Unanswered What are the possible phenotypes of the offspring? Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a Females with normal color vision and males who are colorblind Females who are colorblind and males who have normal color vision