The yellow-body gene in drosophila is recessive and sex-linked.Assume that a heterozygote female is mated to a wild-type male. what would be the phenotypes of the offspring? (draw a Punnet squared for the cross)
Answer:
Yellow-body = b
Wild-type = B
Heterozygote female (XBXb) x (XBY) wild-type male---Parents
|
Xb |
Y |
|
|
XB |
XBXb (wild-type body female) |
XBY (wild-type body male) |
|
Xb |
XbXb(yellow-body female) |
XbY (yellow-body male) |
Wild-type body female = 25%
Wild-type body male = 25%
Yellow-body female = 25%
Yellow-body male = 25%
The yellow-body gene in drosophila is recessive and sex-linked.Assume that a heterozygote female is mated to...
Hemophilia is a sex-linked recessive trait. If a hemophiliac male marries a carrier female, what percent of their daughters will have hemophilia? The gene for yellow body color in Drosophila is recessive and sex-linked. Its dominant allele b+ produces wild-type body color while the recessive allele, b- produces yellow body color in homozygous individuals. List the phenotypes and genotypes of the progeny from the following matings: a. yellow female x wild-type male b. wild-type (carrier) female x wild-type male c....
2.In Drosophila, yellow body is due to an X-linked gene that is recessive to the gene for gray body. (a) A homozygous gray female is crossed with a yellow male. The F1 are intercrossed to produce F2. Give the genotypes and phenotypes, along with the expected proportions, of the F1 and F 2 progeny. (b) A yellow female is crossed with a gray male. The F1 are inter- crossed to produce the F2. Give the genotypes and phenotypes, along with...
Question 23 2.86/2.86 pts In Drosophila yellow body color is caused by a sex-linked recessive allele and brown eye color is an autosomal recessive trait. A phenotypically normal female fly, heterozygous for both genes, is crossed to a male with normal body color and brown eyes. What proportion of their offspring should have yellow body color and brown eyes? Correct! 1/B 1/3 1/4 1/2
Can someone draw the punnet square and help explain this
question
6. In Drosophila, the recessive allele for forked bristles is sex-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 of alleles is mated with a male with forked bristles and purple eyes. What percentage of the daughters will have forked bristles and purple eyes? 100% $75% 50% €25% E0%
A cross in Drosophila involved the recessive, X-linked genes yellow (y), white (w), and cut (ch. A yellow-bodied, white-eyed female with normal wings was crossed to a male whose eyes and body were normal but whose wings were cut . The F, females were wild type for all three traits. • The F, males expressed the yellow-body and white-eye traits. The cross was carried to an F2 progeny, and only male offspring were tallied. On the basis of the data...
A male mouse with a pale yellow coat called cream is mated to a female mouse with a wild-type gray- brown coat. All of the F1 mice, both males and females have the wild-type gray-brown color. One of these F1 female mice is mated to cream-colored male. a. What are the expected results if cream is X-linked and recessive? What are the expected results if cream is autosomal and recessive? In fact, cream is X-linked. When the F1 female...
You are working with recessive mutations at two genes in Drosophila: the fused mutation fu causes fused wings and the garnet mutation g causes bright red eyes. #1) You would like to determine how far the fu gene is from the Bar gene. The Bar mutation B acts dominantly to make a bar-shaped eye. You make a female that is a double heterozygote for the fu and B alleles. To what type of male should you cross this female in...
Scalloped (sd) wing is an X-linked recessive and ebony (e) body color is an autosomal recessive mutation in Drosophila. If a true breeding scalloped female that is wild type for ebony, is mated with a true breeding ebony male that is wild type for scolloped, what proportion of scalloped, normal body colored males is expected in the F2? a. 0 b. 1/16 c. 3/16 d. 1/32 e. 1/8
For a cross between the tan body female fly and the wild-type male fly, is the phenotypic ratio of the F2 offspring for sex linked the same as the Mendelian ratio for a normal non-sex-linked dominant/recessive trait. Select one: True False?
In Drosophila, genes a and b control body size and color, respectively. Large body (a+) is dominant over miniature (a), and gray body (b+) is dominant over ebony (b). The two genes are located at positions 32.0 and 40.0 on a particular autosome. Note that crossing-over does not occur in males. A miniature female that is homozygous for b+ was mated with an ebony male that is homozygous for a+. All the offspring were phenotypically wild-type (large body and gray).....