Biology 1201A Lecture Notes - Lecture 17: Probability Distribution, Antigen, Red Blood Cell

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27 Mar 2016

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One or more chromosomes hat differ in males vs females. Females have two copies of x and males have x and y. Y is partly homologous to x and they behave as if they"re homologous even though they cant have the same genes in the same locations. Some genes on the y chromosome that are not on the x and vice versa. Every egg will receive a x chromosome. One of every two sperm will have x and one of every two will have y. If you have a daughter or son it depends if you get a x or y from the sperm. Mated a red eyed female and a white eyed male rr x rr. All offspring are red eye which would make us think that red allele is dominant. Mated white eyed female and a red eyed male- rr x rr. We got half red eyed and half white eyed.

Related Questions

If the white-eye trait were X-linked dominant, rather than X-linked recessive, what result would you expect when crossing a heterozygoud white-eyed female with a white-eyed male?

Answer Choices

1) In each sex, half of the offspring will have red and half of the offspring will have white eyes.

2) all red-eyed progeny

3) all red-eyed males with half of the females having white and half of the females having red eyes.

4) all white-eyed females with half of the males having white and half of the males having red eyes.

5) all red-eyed females with half of the males having white and half of the males having red eyes

Thank you

The following question is a sex-linked trait. Review the patterns of inheritance of sex-linked traits before answering the following questions. Make sure to indicate chromosomes and alleles in your answers when necessary.

Hemophilia is a caused by a recessive mutation found on the X chromosome in humans. The recessive allele (X^h) is associated with abnormal blood clotting (hemophilia), while the dominant allele (X^N) causes normal blood clotting.

A man with normal blood clotting and woman who is heterozygous are going to have a child. What is the probability of an offspring who is a carrier of hemophilia, and if so, the sex(es) of the offspring?

A. Chances are 25% of a son who is a carrier

B. There is no chance of an offspring who is a carrier

C. Chances are 50% of either a son or a daughter who is a carrier

D. All offspring, male or female, will be carriers

E. Chances are 1 in 4 of a daughter who is a carrier

2. Two fruit flies, one with red eyes and one with white eyes mate and have an offspring with white eyes. Having red eyes is a dominant trait (R) while white eyes (w) is recessive. Based on this information, what must be the genotypes of the parental white-eyed fruit fly and the parental red-eyed fruit fly?

A. Red-Eyed fruit fly: Rw

White-eyed fruit fly: ww

B. Red-Eyed fruit fly: RR

White-eyed fruit fly: wR

C. Red-Eyed fruit fly: R

White-eyed fruit fly: w

D. Red-Eyed fruit fly: rr

White-eyed fruit fly: wr

E. Red-Eyed fruit fly: RR

White-eyed fruit fly: ww

Genes located on mitochondrial DNA are usually inherited in whatfashion?
A. Randomly
B. From the mother
C. From the father
D. Evenly from both the mother and the father
E. By independent assortment

Wild type fruit flies have red eyes. A white-eyed female fly iscrossed with a red-eyed male fly. All of the females from the crossare red-eyed and all of the males, white-eyed. What type ofinheritance pattern is this?
A. Independent assortment
B. Autosomal dominant
C. Autosomal recessive
D. Incomplete dominance
E. Sex-linked on X chromosome

What fraction of the offspring of the cross AaBb

Biology 1201A Lecture Notes - Lecture 17: Probability Distribution, Antigen, Red Blood Cell

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