The shape of a heliodor is an X-linked trait. Male heliodors inherit two X chromosomes, while the females inherit an X and a Y chromosome. The recessive allele codes for the while the dominant phenotype is a round shape common bell-shape. daughter, Hannah, who is shaped like her mother. Hudson is a round male and has offspring with Heidi, a bell-shaped female. They already have one What is Hannah's genotype? XRY XrY XRXR XRX"
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- Human females have two X chromosomes (XX); males have one X and one Y chromosome (XY). a. With respect to X-linked alleles, how many different types of gametes can a male produce? b. If a female is homozygous for an X-linked allele, how many types of gametes can she produce with respect to that allele? c. If a female is heterozygous for an X-linked allele, how many types of gametes can she produce with respect to that allele?Analysis of X-Linked Dominant and Recessive Traits In the eighteenth century, a young boy with a skin condition known as ichthyosis hystrix gravior was identified. The phenotype of this disorder includes thickening of skin and the formation of loose spines that are sloughed off periodically. This man married and had six sons, all of whom had the same condition. He also had several daughters, all of whom were unaffected. In all succeeding generations, the condition was passed on from father to son. What can you theorize about the location of the gene that causes ichthyosis hystrix gravior?Hello Heliodors! (cont.) Trait C The shape of a heliodor is an X-linked trait. Male heliodors inherit two X chromosomes, while the females inherit an X and a Y chromosome. The recessive allele codes for the common bell-shape while the dominant phenotype is a round shape U. Hudson is a round male and has offspring with Heidi, a bell-shaped female. They already have one daughter, Hannah, who is shaped like her mother. The reason for your answer above is: O Being male or female has no impact on the shape of a heliodor Males heliodors inherit two X chromosomes, so it is less likely they would only inherit two recessive alleles for being round. Females heliodors inherit two X chromosomes, so it is less likely they would only inherit two recessive allele for being round O Males only need to inherit one recessive allele to be round.
- Hello Heliodors! (cont.) Trait C The shape of a heliodor is an X-linked trait. Male heliodors inherit two X chromosomes, while the females inherit an X and a Y chromosome. The recessive allele codes for the common bell-shape while the dominant phenotype is a round shape U. Hudson is a round male and has offspring with Heidi, a bell-shaped female. They already have one daughter, Hannah, who is shaped like her mother. What percentage of their offspring will be carriers for the bell-shape trait? 75% 0% 25% 100% O 50%Hello Heliodors! (cont.) Trait C The shape of a heliodor is an X-linked trait. Male heliodors inherit two X chromosomes, while the females inherit an X and a Y chromosome. The recessive allele codes for the common bell-shape while the dominant phenotype is a round shape U. Hudson is a round male and has offspring with Heidi, a bell-shaped female. They already have one daughter, Hannah, who is shaped like her mother. There is a type your answer.. % that their next child will also be bell-shaped female like Hannah.Hello Heliodors! (cont.) Trait C The shape of a heliodor is an X-linked trait. Male heliodors inherit two X chromosomes, while the females inherit an X and a Y chromosome. The recessive allele codes for the common bell-shape while the dominant phenotype is a round shape U. Hudson is a round male and has offspring with Heidi, a bell-shaped female. They already have one daughter, Hannah, who is shaped like her mother. In the heliodor population you will find: O fewer bell-shaped males than females. the same amount of bell-shaped males as females. more bell-shaped males than females.
- Hello Heliodors! (cont.) Trait C The shape of a heliodor is an X-linked trait. Male heliodors inherit two X chromosomes, while the females inherit an X and a Y chromosome. The recessive allele codes for the common bell-shape 2 \while the dominant phenotype is a round shape O. Hudson is a round male and has offspring with Heidi, a bell-shaped female. They already have one daughter, Hannah, who is shaped like her mother. What is Hudson's genotype? XRY XRXR XRX"Hello Heliodors! (cont.) Trait C The shape of a heliodor is an X-linked trait. Male heliodors inherit two X chromosomes, while the females inherit an X and a Y chromosome. The recessive allele codes for the common bell-shape 2\while the dominant phenotype is a round shape O. Hudson is a round male and has offspring with Heidi, a bell-shaped female. They already have one daughter, Hannah, who is shaped like her mother. What is Heidi's genotype? XRY X'Y XRXR XRXr X'X"I. White eye cross White eye color is a recessive trait found on the X chromosome. Also called Sex-linked. This is called sex-linked. Gene symbols Xw White eye color X normal red eye color Y it’s a boy The parents were White eye color female XwXw and red eye color male XY Diagram of P1 cross: You are crossing XwY and XXw (figure out the phenotype) Diagram of F1 cross: Give expected F2 phenotypic ratio: Give expected F2 genotypic ratio:
- The allele for color-blindness is carried on the X chromosome. Making color blindness (a recessive trait) an X - linked trait. A colorblind make and a carrier female for color blindness. (But is not colorblind herself) have a child. Show your work! A) what is the % chance that their son will be color blind? B) what is the % chance that their daughter will be color blind?for abor Monohybrid crossing the monohybrid and dihybrid crosses. 1. A baby with type Ab blood is born into a family where the mother has type B blood and father type O blood. (i) Determine whether the husband is the biological father of the baby. Explain your answer in (i) above. (ii) 2. Silky feathers in fowls are caused by an allele which is recessive to the allele for normal feathers. 200 birds were raised from a cross between two heterozygous individuals. Predict the number of the birds that would expected to be silky and those expected to be normal. If about half of the offspring turned out to be silky, comment on the nature of the normal. If you had normal feather birds, propose the easiest way to determine whether its homozygous or heterozygous. 3. In dogs, black fur is dominant to white fur. Determine the possible offspring from crosses between: Homozygous black and white. (1) Heterozygous black and heterozygous black. (iii) Detach this page from your manual and att ch it to…Concepts/Words to know: Gregor Mendel P, F1, F2 Generations Homozygous Pea Plants Dominant and recessive Genetic disorders Autosomal X-linked recessive Codominant X-linked Carrier Blood Types and transfusions Pedigrees Punnett Square Incomplete Dominance Hemophilia Heterozygous Allele 1) A green pea plant (Gg) is crossed with a yellow pea plant (gg). 2) A tall plant (TT) is crossed with a tall plant (Tt). 3) A tall plant (Tt) is crossed with a short plant (tt). 4) A red flower (Rr) is crossed with a white flower (rr). 5) A white flower (rr) is crossed with a white flower (rr). 6. A homozygous dominant brown mouse is crossed with a heterozygous brown mouse (tan is the recessive color). 7. Two heterozygous white (brown fur is recessive) rabbits are crossed. 8. In some chickens, the gene for feather color is controlled by codiminance. The heterozygous phenotype is known as erminette. a. What is the genotype for black chickens? b. What is the genotype for white chickens? c. What is the…