Sex determination is different in birds and mammals. Describe how this difference in sex determination leads to a different probability of inheriting a sex-linked trait in male and female mammals versus birds.
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Sex determination is different in birds and mammals. Describe how this difference in sex determination leads to a different probability of inheriting a sex-linked trait in male and female mammals versus birds.
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- Describe genetic linkage. What is the role of location on a particular chromosome in determining if two traits are linked? Describe the role that blood antibodies play in determining which blood types can be transfused into a particular patient. Use several examples to support your assertions. Sex determination is different in birds and mammals. Describe how this difference in sex determination leads to the different probability of inheriting a sex-linked trait in male and female mammals versus birds.The dosage of X chromosome expression is equalized between male and female mammals. Think about the example of calico cats to answer the following questions. Use Xb to represent the allele for black fur, XB to represent the allele for orange fur. What genotype(s) of female cats is/are expected to have a calico coat? Is it possible to have a calico cat that is male? Explain.Part 2 Spotty and Cutie have puppies and 50% of the puppies are unaffected for both traits (not blind and not BHFD). What is Spotty's genotype? bbDD bbdd BBDd BbDd BbDD BBdd
- The inheritance of colour in domestic pigeons involves several genes. The dominance hierarchy of three colour alleles is ash-red > blue-black > brown (ZA > ZB > Zb ).These colours are carried on the Z sex chromosome. Unlike humans, female pigeons have two different sex chromosomes (Z and W) and males have two of the same kind of sex chromosome (ZZ). In birds, males have two Z sex chromosomes (ZZ) and females have one Z and one W sex chromosome (ZW). Since female birds have only one Z chromosome, they have only one copy of all Z-linked genes and they express the phenotype of the allele that they get.Barred is a sex-linked dominant trait in chickens. The barring allele causes white pigment in bars on a solid color producing an alternating pattern. The original solid color in the chickens below is black. The possible genotypes and their corresponding phenotypes are as follows: Genotype Gender Feather Phenotype ZBZB Male Barred ZBZb Male Barred ZbZb Male Black…The inheritance of colour in domestic pigeons involves several genes. The dominance hierarchy of three colour alleles is ash-red > blue-black > brown (ZA > ZB > Zb ).These colours are carried on the Z sex chromosome. Unlike humans, female pigeons have two different sex chromosomes (Z and W) and males have two of the same kind of sex chromosome (ZZ). A heterozygous blue-black male pigeon mated with a brown female pigeon. What are the expected genotypes of the offspring? Select one: a. ZAZb, ZBZb, ZBW, and ZAW b. ZBZb, ZbZb, ZBW, and ZbW c. ZBZb and ZbW d. ZBZB,, ZBZb, ZbZb, ZBW, and ZbWThe inheritance of colour in domestic pigeons involves several genes. The dominance hierarchy of three colour alleles is ash-red > blue-black > brown (ZA > ZB > Zb ).These colours are carried on the Z sex chromosome. Unlike humans, female pigeons have two different sex chromosomes (Z and W) and males have two of the same kind of sex chromosome (ZZ). Which of the following statements is true for sex-linked traits in birds? Select one: a. Females can inherit an allele for a Z-linked trait only from their father, and males can inherit an allele for a Z-linked trait only from their mother. b. Males can inherit an allele for a Z-linked trait only from their mother, and females can inherit an allele for a Z-linked trait from either their mother or father. c. Both sexes can inherit an allele for a Z-linked trait from either their mother or father. d. Females can inherit an allele for a Z-linked trait only from their father, and males can inherit an allele for a Z-linked trait…
- The inheritance of colour in domestic pigeons involves several genes. The dominance hierarchy of three colour alleles is ash-red > blue-black > brown (ZA > ZB > Zb ).These colours are carried on the Z sex chromosome. Unlike humans, female pigeons have two different sex chromosomes (Z and W) and males have two of the same kind of sex chromosome (ZZ). An ash-red male pigeon mated with a blue-black female pigeon.Is it possible to obtain a brown male pigeon? Answer (choose one from the picture ).The mode of inheritance of the auricular hypertrichous trait in the Brown family is clearly an instance of: Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. b d recessive inheritance with the females being carriers. dominant inheritance with the males being carriers. X-linked inheritance, which is being expressed in the males since they only have one X chromosome. Y-linked inheritance, which can never be passed on to females.In Drosophila (fruit flies) the gene for eye color is X-linked. The allele R codes for red eyes and is dominant to its allele r, which codes for white eyes. Give the genotypic and phenotypic ratios for the expected offspring from mating a white eyed male and a heterozygous red eyed female.
- EXAMPLE PROBLEM Two black female mice are crossed with a brown male. In several litters, female I produced 9 black offspring and 7 brown; female II produced 57 black offspring. What deductions can you make about the inheritance of black and brown coat color in mice? What are the genotypes of the parents? Dominance and recessive describe which of two possible phenotypes are exhibited when two different alleles occur in the same individual.In Drosophila, the recessive allele for forked bristles is X-linked, and the recessive allele for purple eyes is autosomal. The wild- type alleles are for straight bristles and red eyes, respectively. A female heterozygous for both pairs is mated with a male with forked bristles and purple eyes. What percentage of the males will have forked bristles and purple eyes? 25% O 50% O 75% 100%Miniature wings (Xm) in Drosophila result from an X-linked allele that is recessive to the allele for long wings (X*). Give the genotypes of the parents in the following cross: Male parent Female parent Male offspring Female offspring Long Miniature 750 miniature 761 long O male: X* / X* and female X™ /x+ O male: X*/Xt and female Xm /xm O male: X*/ Y and female Xm /xm O male: Xm/ Y and female Xm /xm