In the Z-W system of sex determination, the males are represented as __________, whereas the females are represented as ___________.In his classical experiment with white-eyed Drosophila flies, Thomas Hunt Morgan crossed red-eyed (wild-type) females with white-eyed males. He then crossed the red-eyed F1 generation fruit flies with each other and discovered that, while the F2 generation included both red-eyed and white-eyed individuals, _____________.What is the inheritance pattern for a trait where all of the daughters and none of the sons of an affected male are affected?The end product of egg formation in humans is a large, nutrient-rich ________.What accounts for equal expression of genes on the X chromosome in human males and females despite the fact that males and females have an unequal complement of sex chromosomes?One form of hereditary deafness is inherited with an X-linked recessive allele. What can be expected for the offspring of a deaf mother and a father with normal hearing?A XXY fruit fly can make ________ types of gametes in terms of sex chromosome content.In humans, the male is known as the __________ sex, because males can make two types of gametes: one type of sperm carries only the X chromosome, and another type carries the Y chromosome.Consider a fruit fly that has two sets of autosomes and a sex chromosome composition XXY. This fly would be a(n) ________.When Morgan crossed a white-eyed female fly with a red-eyed male fly, the pattern seen in the progeny was crisscross inheritance. Select the phenotype of the progeny flies.Choose the correct statement about the Z-W system of sex determination.Drosophila embryos that are XO develop into Blank______.When you consider only the sex chromosomes, what types of gametes are produced by a female individual of a species with the XY system of sex determination?Which type(s) of chromosomes provide the basis for sex determination in most mammals?Drosophila melanogaster has four pairs of chromosomes. Sperm from this species are formed by a meiotic process in which no crossing over occurs. How many genetically different kinds of sperm could be produced by a Drosophila melanogaster male?In primroses, the dominant allele of gene K is necessary to synthesize blue flower pigment. Blue pigment synthesis is inhibited by a dominant allele of gene D. In other words, plants with the genotype K- D- will not produce pigment (and their flowers will be white) because of the presence of the D allele. If two dihybrid plants (KkDd) are crossed, how many plants would you EXPECT to need to grow to get 15 blue flowering primrose plants?Note: Put in a number based on the phenotypic ratio.The map distance between w and y genes is 1.1 m.u.. A white-eyed (w) yellow bodied (y) female is crossed to a red-eyed, brown-bodied male. The F1 females (red-eyed, brown-bodied) are crossed to males and the F2 male phenotypes are scored. How many of a 2000 progeny would you expect to be white-eyed, brown bodied?During oogenesis in humans, cells called _________ __________ are formed from oogonia and undergo meiosis to ultimately form an ovum.Fruit flies with one allele for curly wings (Cy) and one allele for normal wings (Cy+) have curly wings. When two curly-winged flies were crossed, 203 curly-winged and 98 normal-winged flies were obtained. In fact, all crosses between curly-winged flies produce nearly the same curly : normal ratio among the progeny. If a curly-winged fly was mated to a normal-winged fly, how many curly-winged flies would you expect among 270 total offspring?Place these cells in the correct order in which they are formed during spermatogenesis, starting with the earliest at the top.- Spermatogonia- Sperm cells- Primary spermatocytes- Secondary spermatocytes- Spermatids
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