Polydactyly is an autosomal dominant condition in which an individual is born with more than five fingers and toes. Suppose that a man with polydactyly and a woman who does not have polydactyly have children. All of their children have polydactyly. A. In this cross, what is the genotype of the father? What is the genotype of the mother? Use the letter 'D' to indicate the alleles of each genotype. B. What is the genotypic ratio of their offspring?

Can two polydactylic people have a child without polydactyly? Please explain.

Elizabeth is married to John, and they have four children. Elizabeth has a straight nose "n" (recessive) and dimples “D"(dominant). John has also dimples, but he has a convex nose “N"(dominant). Of their four children, Ellen is just like her father, and Dan is just like his mother. The other children-Anne, who has a convex nose, and Peter, who has a straight nose have no dimples "d”. Answer the following questions about this family: •What are the genotypes of Elizabeth and John? •Using a Punnett square determine possible genotypes of children. •Elizabeth's father was a straght-nosed/ dimples, while her mother was a convex-nosed/ dimples. What can you figure out about their genotypes? •John's father was a straight-nosed dimples, while his mother was convex- nosed/dimples. What can you determine about their genotypes?

Baldness is a recessive, X-linked trait. Mom has a full head of hair but she is a carrier for baldness and her husband has a full head of hair. What are the chances of they having a child who is bald? 0% (no chance)   50%   75%   100% (all of them will be)   25%

List four major types of aneuploidy.

What is the genotype of the father and mother? What is the phenotype of youngest son of the couple? What is the probability of the couple 6-7 having a normal child? Based from the pedigree where is the polydactyly trait can be found?

One couple has three children with following sex and ages: one son (40 y.o.) and two daughters (35 y.o. and 33 y.o.), all of them have normal pigmentation. Another couple has a son (35 y.o) and a daughter (20 y.o.) and all of them also have normal pigmentation. Both couples have normal pigmentation. The younger daughter from the first couple married the son of the second couple and they had three children. Their eldest daughter (5 y.o.) has normal pigmentation while their only son (3 y.o.) and one daughter (1 y.o.) have albinism.

Boe is normal and his wife is not color-blind, she is a carrier. Which of the following children they can't have? all of them carrier daughter normal daughter color-blind son color-blind daughter

what is the probability that a couple (both heterozygous for the same recessive mutation) will have two children with the disease if the couple plans to have four children in total?

What is Polygenic Inheritance? A) When one gene has many effects B) The additive effect of 2 or more genes C) The genes that cause skin color