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To ensure that only the desired pollens fall on the stigma in artificial hybridization process: a: the female flower buds of plant producing unisexual flower need not be bagged. b: there is no need to emasculate unisexual flowers of selected female parent. c: emasculated flowers are to be bagged immediately after cross pollination. d: emasculated flowers are to be bagged after removal of anthers. e: bisexual flowers, showing protogyny are never selected for cross. Choose the correct answer from the options given below:
In Mendel's experiments with garden peas, round seed shape (RR) was dominant over wrinkled seeds (rr), and yellow cotyledon (YY) was dominant over green cotyledon (yy). What are the expected phenotypes in the F2 generation of the cross RRYY x rryy?
Pneumatophores occur in:
A low frequency recombination indicates that the genes are:
Sweet potato is a modified:
Given below are four methods (A-D) and their modes of action (1-4) in achieving contraception. Select their correct matching from the four options that follow:<br><br>Column I<br>A. The Pill<br>B. Condom<br>C. Vasectomy<br>D. Copper T<br><br>Column II<br>1. Prevents sperms reaching cervix<br>2. Suppress sperm motility<br>3. Prevents ovulation<br>4. Semen contains no sperms
In the equation $GPP - R = NPP$, R represents :
Coconut fruit is a:
In Drosophila the XXY condition leads to femaleness whereas in human beings the same condition leads to Klinefelter's syndrome in males. It proves:
In general, the egg apparatus of the embryo sac in angiosperms consists of:
Example of an edible underground stem is:
In a plant, red fruit (R) is dominant over yellow fruit (r) and tallness (T) is dominant over shortness (t). If a plant with RRTt genotype is crossed with a plant that is rrtt, what percentage of the offspring will be tall with red fruit?
Given below are two statements: Statement I: Failure of segregation of chromatids during cell cycle, resulting in the gain or loss of whole set of chromosome in an organism, is known as aneuploidy. Statement II: Failure of cytokinesis after anaphase stage of cell division resulting in the gain or loss of chromosome is called polyploidy. In the light of the above statements, choose the correct answer from the options given below:
Diadelphous is found in
Coconut milk factor is:
Diadelphous stamens are found in:
Mental retardation in man occurs due to:
The term 'polyadelphous' is related to?
In the assisted reproductive technology where gametes have been fertilized in vitro, which of the following is practicable for embryo transplantation in fallopian tube?
Which of the following occurs due to the presence of autosome linked dominant trait?