BIO201

A. 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 ____.

B. A condition in which more than one sperm fertilizes an egg is called __________

C. A phenomenon whereby the gene for a trait is located on the X or Y chromosome is known as ________

D. The following are true of chromosomes except _____.

E. The sex which has only one X or Z chromosome is described as being _________

F. _____ postulated the preformation theory.

G. The diploid number of chromosomes in humans is _________

H. It is assumed that skin colour in man is determined by a maximum of _________ additive loci.

I. 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?

J. Albinism is an autosomal trait in human. The allelic symbol ‘a’ of an albino shows that the genotype is __________

K. The symbols used to represent the alleles of genotypes of an individual are called __________

L. In drosophila, non-disjunction cannot occur between ____.

M. One of the most clear – cut piece of evidence ilIustrating sex – linked inheritance was reported by ___________

N. 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?

O. 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 _________

P. The following are true of genetics except ____.

Q. A cross between an offspring and one of its parents is known as a ____________

R. ____________ is regarded as the father of Genetics.

S. A genetic experiment involves a trihybrid cross : AaBbCc x AaBbCc. What is the number of genetic fusions?

T. 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 ____.

U. If two coins are thrown simultaneously, what is the probability that the first coin will be head and the second tail?

V. An individual having two unidentical alleles of a given gene is said to be _________ for that gene.

W. _________ advanced the theory of evolution.

X. In sex determination system, an XO individual is phenotypically a _________

Y. In which of the following sex abnormallies in man are those affected recognized as females but are poorly developed?

Z. The most prominent adherent to the inheritance of acquired characteristics in recent times was ________

AA. A cross in which the traits of the male and the female are reversed is known as a ___________ cross.

AB. 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 ____.

AC. _________ disproved the Hyppocrate’s theory.

AD. The observable characteristics of an organism is referred to as the ________

AE. The stage at which chromosomes move to the opposite poles during cell division is called __________

AF. In a heterozygote, the allele that is not expressed is the ________ allele

AG. Genes in the X-chromosome forming the barr body is __________

AH. Boveri was able to show that the abnormal development of a dispermic embryo was the result of the __________ chromosome distribution.

AI. The performation theory postulated that a miniature human being called a ___________ is present in the sperm.

AJ. 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 _________

AK. Where a gene is not sex – linked, it must therefore be __________

AL. The following statements are pararallel between the genetics and cytological facts that form the basis of the chromosome theory except ____.

AM. Genes located on the Y chromosome can specifically be referred to as __________ genes.

AN. ______ made an elaborate drawing of homunculus.

AO. According to Darwin, exact miniature replicas called ________ of the body parts and organs are carried in the blood stream to be assembled in the gametes.

AP. Which of the following statements best describe aneuploidy?

AQ. A genetic experiment involves a trihybrid cross : AaBbCc x AaBbCc. How many genes are involved in this experiment?

AR. Whose theory stated that “small representative of all parts of the parental body are concentrated in the semen”?

AS. In human males, the sex chromosomal constitution is _________

AT. In a genetic cross, the parents are symbolized P while the second generation is symbolized as __________

AU. In order to have four toes in guinea pugs, there must be at least ____________ contributing alleles present

AV. Who advanced the theory that the cell nucleus must contain the hereditry materials? I. Strasburger, II. Edward van benden, III. Hertrig , IV. Roux

AW. _____ provided the most convincing proof of the theory that genes are on chromosomes.

AX. Albinism is an autosomal trait in human. The allelic symbol ( A ) is for __________

AY. 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 _________

AZ. The following are patterns of sex chromosome distribution except _____.

BA. What is the probability that the first child of Aa x aa parents will have a recessive genotype?

BB. The division of chromosomes in mitosis as well as their constancy was described by _____.

BC. In sex determination system, an XXY individual is phenotypically a ________

BD. 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 __________