1) Assume that the ratio of females to males is 1:1. A couple already has two da
ID: 211556 • Letter: 1
Question
1) Assume that the ratio of females to males is 1:1. A couple already has two daughters and no sons. If they plan to have a total of six children, what is the probability that they will have four more girls? (a) 1/4 (b) 1/8 (c) 1/16 (d) 1/32 (e) 1/64 2). Red-green color blindness is an X-linked recessive disorder in humans. Your friend is the daughter of a color-blind father. Her mother had normal color vision, but her maternal grandfather was color-blind. What is the probability that your friend is color-blind? (a) 1 (b) 1/2 (c) 1/4 (d) 3/4 (e) O 3). When two long-winged flies were mated, the offspring included 77 with long wings and 24 with short wings. Is the short-winged condition dominant or recessive? What are the genotypes of the parents? 4). Darwin's theory of evolution by natural selection is based on four observations about the natural world. One of them is that each individual has a combination of traits that makes it uniquely different. Darwin recognized that much of this variation among individuals must be inherited, but he did not know about Mendel's mechanism of inheritance. Based on what have learned in this chapter, briefly explain the variation among individuals that Darwirn observed. youExplanation / Answer
1. the probability of having a girl in one birth is 1/2. probability that the the will have four more girls will be (1/2)4
=1/16
2. color blind father XcY
mother is a carrier since her father was color blind = XcX
a X linked recessive disease needs two copies in the female and the females with one copy are called carriers with normalphenotype.
the cross
XcY x XcX
XcX and XcXc
the probability of a daughter = 1/2
the probability of color blindness among daughters 1/2
1/2*1/2=1/4
3. short wings are recessive, if the long wings are L and short wings are l
the parents are Ll x Ll = LL, Ll, Ll, ll
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.