Category: BIO201



1 / 50

The following are true of chromosomes except _____.

2 / 50

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

3 / 50

In drosophila, non-disjunction cannot occur between ____.

4 / 50

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

5 / 50

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

6 / 50

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

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 ____.

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?

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?

10 / 50

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

11 / 50

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

12 / 50

_____ postulated the preformation theory.

13 / 50

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

14 / 50

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

15 / 50

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

16 / 50

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

17 / 50

In human males, the sex chromosomal constitution is _________

18 / 50

The following are patterns of sex chromosome distribution except _____.

19 / 50

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

20 / 50

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

21 / 50

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

22 / 50

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

23 / 50

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

24 / 50

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

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

26 / 50

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

27 / 50

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

28 / 50

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

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 _________

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 ____.

31 / 50

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

32 / 50

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

33 / 50

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

34 / 50

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

35 / 50

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

36 / 50

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

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 _________

38 / 50

______ made an elaborate drawing of homunculus.

39 / 50

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

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 ____.

41 / 50

Which of the following statements best describe aneuploidy?

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 _________

43 / 50

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

44 / 50

____________ is regarded as the father of Genetics.

45 / 50

The following are true of genetics except ____.

46 / 50

The diploid number of chromosomes in humans is _________

47 / 50

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

48 / 50

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

49 / 50

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

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 __________

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