Test cross involves-
- Crossing between two genotypes with recessive trait
- Crossing between two $F_1$ hybrids
- Crossing the $F_1$ hybrid with a double recessive genotype
- between two genotypes with dominant trait.
The Correct Option is C
Solution and Explanation
Top Questions on monohybrid cross
- In a flowering plant, a cross is made between a homozygous dominant tall plant (TT) and a homozygous recessive dwarf plant (tt). What is the phenotypic ratio of the F1 generation?
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- A pink flowered Snapdragon plant was crossed with a red flowered Snapdragon plant. What type of phenotype/s is/are expected in the progeny?
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- In a plant, black seed color (BB/Bb) is dominant over white seed color (bb). In order to find out the genotype of the black seed plant, with which of the following genotype will you cross it?
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- In a monohybrid cross between two heterozygous parents (\(Aa \times Aa\)), what is the genotypic ratio among the offspring?
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- In mice, a trait is determined by a dominant allele Y and recessive allele y. What proportion of the offspring from a YY × yy cross is expected to be homozygous recessive in F1 generation?
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Questions Asked in NEET exam
The current passing through the battery in the given circuit, is:
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A bob of heavy mass \(m\) is suspended by a light string of length \(l\). The bob is given a horizontal velocity \(v_0\) as shown in figure. If the string gets slack at some point P making an angle \( \theta \) from the horizontal, the ratio of the speed \(v\) of the bob at point P to its initial speed \(v_0\) is :
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- Two cities X and Y are connected by a regular bus service with a bus leaving in either direction every T min. A girl is driving scooty with a speed of 60 km/h in the direction X to Y. She notices that a bus goes past her every 30 minutes in the direction of her motion, and every 10 minutes in the opposite direction. Choose the correct option for the period T of the bus service and the speed (assumed constant) of the buses.
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- Relative Velocity
- The intensity of transmitted light when a polaroid sheet, placed between two crossed polaroids at \(22.5^\circ\) from the polarization axis of one of the polaroids (\(I_0\) is the intensity of polarised light after passing through the first polaroid):
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A full wave rectifier circuit with diodes (\(D_1\)) and (\(D_2\)) is shown in the figure. If input supply voltage \(V_{in} = 220 \sin(100 \pi t)\) volt, then at \(t = 15\) msec:
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Concepts Used:
Monohybrid Cross
“A monohybrid cross is the hybrid of 2 individuals with homozygous genotypes that result in the opposite phenotype for a certain genetic trait.”
“The cross between two monohybrid traits (for instance, TT and tt) is called a Monohybrid Cross.”
How To Carry Out A Monohybrid Cross?
These are the steps used in order to calculate a monohybrid cross:
- Indicate the alleles operating characters – dominant alleles can be indicated by upper case letters while recessive alleles can be indicated by lower case letters.
- Note down both the genotype and the phenotype of the parents or the parental generation that are being crossed.
- Markdown the genotype of the gametes from the parental generation – As an outcome of meiotic division, the gametes will be haploid.
- Tabulate a Punnett square to arrange the probable combinations of the gametes – Any combination is possible as the process of fertilization is at random.
- The genotype and the phenotype ratios of the prospective offspring can be written. The outcome hence acquired is known as the F1 generation. The F2, F3, etc, generations form the subsequent generations.
Read More: Difference Between Monohybrid and Dihybrid