Category: BIO201 0 BIO201 1 / 50 The following are true of chromosomes except _____. are long twining chains of genetic materials There are many genes on one chromosome are hereditary factors are sites where genes are formed 2 / 50 Whose theory stated that “small representative of all parts of the parental body are concentrated in the semen”? Aristotle Christian Wolf Hippocrates Jan Swammerdam 3 / 50 In drosophila, non-disjunction cannot occur between ____. Sister chromatids in mitosis A pair of homologues in meiosis-I A pair of homologues in meiosis-II Sister chromatids in meiosis-II 4 / 50 Albinism is an autosomal trait in human. The allelic symbol ( A ) is for __________ Check 5 / 50 Genes in the X-chromosome forming the barr body is __________ Check 6 / 50 The performation theory postulated that a miniature human being called a ___________ is present in the sperm. Check 7 / 50 In Nilsson- Ehle’s work with the colour of wheat kernel, a cross between pure breeding dark red-kerneled and white kernel parents were all of intermediate red colour. In the F2 generation however, one- sixteenth of the progeny has the same dark red colour of the Pgeneration parents. This shows that the trait is controlled by ____. One locus Four loci Three loci Two Loci 8 / 50 What is the probability that if a farmer would put his hand in a bowl containing the red seeds from a bowl containing a cross of Rr X Rr, he would pick up a seed which is Rr in genotype? half one quarter three quarters one third 9 / 50 If a farmer put his hand in a bowl containing the red seeds from a cross of Rr x Rr, what is the probability that he would pick a seed which is RR in genotype? three quarters one third one quarter half 10 / 50 The most prominent adherent to the inheritance of acquired characteristics in recent times was ________ Check 11 / 50 A cross between an offspring and one of its parents is known as a ____________ Check 12 / 50 _____ postulated the preformation theory. Christian Wolf Aristotle Jan Swammerdam Hippocrates 13 / 50 In which of the following sex abnormallies in man are those affected recognized as females but are poorly developed? Klinfelter’s syndrome Turner’s syndrome Down’s syndrome trisomy -21 14 / 50 A genetic experiment involves a trihybrid cross : AaBbCc x AaBbCc. How many genes are involved in this experiment? 3 2 4 1 15 / 50 An individual having two unidentical alleles of a given gene is said to be _________ for that gene. Check 16 / 50 It is assumed that skin colour in man is determined by a maximum of _________ additive loci. Check 17 / 50 In human males, the sex chromosomal constitution is _________ Check 18 / 50 The following are patterns of sex chromosome distribution except _____. XX - XO XO -ZZ XX -XY ZZ -ZW 19 / 50 The division of chromosomes in mitosis as well as their constancy was described by _____. Fleming van Beneden Fleming van Benedan and Hertwog Strasburger and Fleming van Beneden Strasburger 20 / 50 In sex determination system, an XXY individual is phenotypically a ________ Check 21 / 50 In a heterozygote, the allele that is not expressed is the ________ allele Check 22 / 50 A cross in which the traits of the male and the female are reversed is known as a ___________ cross. Check 23 / 50 Albinism is an autosomal trait in human. The allelic symbol ‘a’ of an albino shows that the genotype is __________ Check 24 / 50 Boveri was able to show that the abnormal development of a dispermic embryo was the result of the __________ chromosome distribution. Check 25 / 50 Who advanced the theory that the cell nucleus must contain the hereditry materials? I. Strasburger, II. Edward van benden, III. Hertrig , IV. Roux I only II and IV I and III II only 26 / 50 In a genetic cross, the parents are symbolized P while the second generation is symbolized as __________ Check 27 / 50 What is the probability that the first child of Aa x aa parents will have a recessive genotype? three quarters 1 one quarter half 28 / 50 The stage at which chromosomes move to the opposite poles during cell division is called __________ Check 29 / 50 Two individuals heterozygous at certain loci are crossed, given that the number of loci = n, an expression that represent the number of different types of gametic fusion is given by _________ Check 30 / 50 A cross between a male chicken and a normal female which results in two female to one male instead of the expected 1:1 ratio among progeny of this cross is a proof that the male has a chromosomal constitution of ____. ZW none of the above ZZ WW 31 / 50 A phenomenon whereby the gene for a trait is located on the X or Y chromosome is known as ________ Check 32 / 50 A condition in which more than one sperm fertilizes an egg is called __________ Check 33 / 50 _____ provided the most convincing proof of the theory that genes are on chromosomes. Weismann Boveri Sutton Roux 34 / 50 The sex which has only one X or Z chromosome is described as being _________ Check 35 / 50 The following statements are pararallel between the genetics and cytological facts that form the basis of the chromosome theory except ____. In diploid organisms, genes occur in pairs. Members of different gene pairs recombine at random at the time of segregation Members of a gene pairs separate at the time of gamete formation Different pairs of gene are located on different chromosomes 36 / 50 In sex determination system, an XO individual is phenotypically a _________ Check 37 / 50 A situation in which alleles of one gene separate into gametes randomly with respect to the alleles of other genes refers to the law of _________ Check 38 / 50 ______ made an elaborate drawing of homunculus. Nicolass Hartsocker Christian Wolff Aristotle Jan Swammerdam 39 / 50 If two coins are thrown simultaneously, what is the probability that the first coin will be head and the second tail? 1 three-quarters half one quarter 40 / 50 A sex abnormally in man in which the affected females are shorter than average, have webbing of the neck, and mentally retarded is known as ____. Turner’s syndrome Down’s syndrome Klinefelter’s syndrome Trisomy-21 41 / 50 Which of the following statements best describe aneuploidy? Variations in the general composition of chromosomes in an organism Variations in the number of individual chromosomes Variations in the numbers of whole sets of chromosome Variations in the number of group of chromosomes in a set 42 / 50 In Mendel’s experiment on garden peas, tall ( TT ) in dominant over dwarf ( t ). In a TT x tt cross, the chances of obtaining a tall plant is _________ Check 43 / 50 One of the most clear – cut piece of evidence ilIustrating sex – linked inheritance was reported by ___________ Check 44 / 50 ____________ is regarded as the father of Genetics. Check 45 / 50 The following are true of genetics except ____. Genetics is a precise and some what mathematical science Genetics should be studied like literature Genetics is the science dealing with heredity and variation The history of genetics dated even before Christ 46 / 50 The diploid number of chromosomes in humans is _________ Check 47 / 50 Genes located on the Y chromosome can specifically be referred to as __________ genes. Check 48 / 50 The observable characteristics of an organism is referred to as the ________ Check 49 / 50 The symbols used to represent the alleles of genotypes of an individual are called __________ Check 50 / 50 If the genes for a trait occur in both sexes, but the expression of the trait is different in the sexes, the trait is said to be __________ Check Restart quiz Rate this quiz Send feedback
