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Q: What does the sex chromosome genotype XYY produce in drosophilia?
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What does the sex chromosome genotype XX produce in drosophilia?
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- Consider a Droscophilia fly with a genotype of Nn XqYY. The dominant allele of the sex-linked gene specifies a black body and the recessive a white body. The recessive autosomal allele specifies hairy bristles while the dominant allele specifies smooth bristles. i)What is the ploidy of this fly? ii) What would the sex of this fly be? iii)What would the phenotype of this fly be with respect to these two loci?What is a sex pilus and which cell type, F- or F+,would produce this structure?Name the disorder with the following chromosome complement.(i) 22 pairs of autosomes + X X Y(ii) 22 pairs of autosomes + 21st chromosome + XY
- what is the significance of chromosomal aberration? what are the different types of chromosomal abberations based on the structure and number of chromosomes? give examples for each. what environmental factors may increase in the incidence of chromosomal aberrations?Which is the type ofgamete produced by aheterozygous individual?What is the genotypicalproportion of these gametes?An individual heterozygous for a reciprocal translocation possesses the following chromosomes: A B • C D E F G A B • C D V W X R S • T U E F G R S • T U V W X Q. Draw the pairing arrangement of these chromosomes in prophase I of meiosis.
- 13) Use the image below of the X and Y sex chromosomes of a human to answer the following question. Which of the following statements is true? A) This person is a female with Haemophilia. B) This person is a male with Ocular Albinism. C) This person is a female with Ocular Albinism. D) This person is a male with no sex linked genetic disorders. X Ocular albinism Duchenne muscular dystrophy Androgen insensitivity Severe combined immunodeficiency Haemophilia Colour blindness Y DOLD SRY Sex determination AZF Sperm developmentMap distances were determined for four differentgenes (MAT, HIS4, THR4, and LEU2) on chromosome III of the yeast Saccharomyces cerevisiae:HIS4 ↔ MAT 37 cMTHR4 ↔ LEU2 35 cMLEU2 ↔ HIS4 23 cMMAT ↔ LEU2 16 cMMAT ↔ THR4 20 cMWhat is the order of genes on the chromosome?A cell has a diploid number of 12 (2n=24)a) how many chromosomes are present in a daughter cell after meiosis I?b) how many chromatids are present in a daughter cell after meiosis I?c) how many chromosomes are present in a daughter cell after meiosis II?d) how many chromatids are present in a daughter cell after meiosis II?e) how many chromosomes are present in a daughter cell after mitosis?
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